OAuth authorization fails when DAVx5 is opened by Etar

[ArnyminerZ]

Discussed in #1946

^{Originally posted by o-alquimista January 28, 2026}
To reproduce:

1. Open Etar, go to Settings, and press "Add CalDAV calendar". (it should open DAVx5)

2. (DAVx5) Choose the option "Google Contacts / Calendar" from the section "Provider-specific login".
3. Type the account address on the Google Account field, then press "Sign in with Google".
4. (Google OAuth) In the last step of the authorization process (allow DAVx5 access to your account), the page will hang for a while (with a loading animation); then finally it will redirect to google.com.

From step 4, if you close the web view (pressing the X button at the bottom) to return to the DAVx5 app, it will briefly show a toast message saying something went wrong about a token (OAuth token?).

Now, if you skip Etar (step 1) and add the account directly from the DAVx5 app, the authorization (step 4) will succeed.

System info

• Etar 1.0.52 (default LineageOS app).
• DAVx5 4.5.8-ose (from F-Droid)
• LineageOS 23.0 (Android 16)

[ArnyminerZ]

Full logs of launch from Etar

10:00:52.216  I  AssetManager2(0x7e2f525b05d8) locale list changing from [] to [en-US]
10:00:52.226  W  Did not understand login intent: Intent { xflg=0x5 cmp=at.bitfire.davdroid/.ui.setup.LoginActivity }
10:00:52.548  D  hide(ime(), fromIme=false)
10:00:52.548  I  at.bitfire.davdroid:3709af23: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN
10:01:17.924  D  StrictMode policy violation; ~duration=22 ms: android.os.strictmode.DiskReadViolation (Fix with AI)
                 	at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1728)
                 	at libcore.io.BlockGuardOs.access(BlockGuardOs.java:74)
                 	at libcore.io.ForwardingOs.access(ForwardingOs.java:128)
                 	at android.app.ActivityThread$AndroidOs.access(ActivityThread.java:8944)
                 	at java.io.UnixFileSystem.checkAccess(UnixFileSystem.java:332)
                 	at java.io.File.exists(File.java:829)
                 	at org.chromium.chrome.browser.customtabs.CustomTabsConnection.o(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:37)
                 	at org.chromium.chrome.browser.customtabs.CustomTabsConnection.P(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:1)
                 	at uv5.r(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:21)
                 	at cw5.onTransact(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:1101)
                 	at android.os.Binder.execTransactInternal(Binder.java:1421)
                 	at android.os.Binder.execTransact(Binder.java:1365)
                 # via Binder call with stack:
                 	at android.os.StrictMode.readAndHandleBinderCallViolations(StrictMode.java:2671)
                 	at android.os.Parcel.readExceptionCode(Parcel.java:3285)
                 	at android.os.Parcel.readException(Parcel.java:3246)
                 	at android.support.customtabs.ICustomTabsService$Stub$Proxy.warmup(ICustomTabsService.java:347)
                 	at androidx.browser.customtabs.CustomTabsClient.warmup(CustomTabsClient.java:236)
                 	at net.openid.appauth.browser.CustomTabManager$1.onCustomTabsServiceConnected(CustomTabManager.java:84)
                 	at androidx.browser.customtabs.CustomTabsServiceConnection.onServiceConnected(CustomTabsServiceConnection.java:54)
                 	at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:2235)
                 	at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:2268)
                 	at android.os.Handler.handleCallback(Handler.java:995)
                 	at android.os.Handler.dispatchMessage(Handler.java:103)
                 	at android.os.Looper.loopOnce(Looper.java:248)
                 	at android.os.Looper.loop(Looper.java:338)
                 	at android.app.ActivityThread.main(ActivityThread.java:9067)
                 	at java.lang.reflect.Method.invoke(Native Method)
                 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
                 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:932)
10:01:25.153  D  StrictMode policy violation: android.os.strictmode.UnsafeIntentLaunchViolation: Launch of unsafe intent: Intent { act=android.intent.action.VIEW dat=https://accounts.google.com/... xflg=0x4 pkg=com.android.chrome (has extras) } (Fix with AI)
                 	at android.os.StrictMode.onUnsafeIntentLaunch(StrictMode.java:2464)
                 	at android.content.Intent.prepareToLeaveProcess(Intent.java:13109)
                 	at android.content.Intent.prepareToLeaveProcess(Intent.java:13025)
                 	at android.content.Intent.prepareToLeaveProcess(Intent.java:13015)
                 	at android.app.Instrumentation.execStartActivity(Instrumentation.java:1994)
                 	at android.app.Activity.startActivityForResult(Activity.java:5997)
                 	at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.kt:694)
                 	at android.app.Activity.startActivityForResult(Activity.java:5954)
                 	at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.kt:679)
                 	at android.app.Activity.startActivity(Activity.java:6457)
                 	at android.app.Activity.startActivity(Activity.java:6424)
                 	at net.openid.appauth.AuthorizationManagementActivity.onResume(AuthorizationManagementActivity.java:228)
                 	at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1717)
                 	at android.app.Activity.performResume(Activity.java:9315)
                 	at android.app.ActivityThread.performResumeActivity(ActivityThread.java:5605)
                 	at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:5648)
                 	at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:73)
                 	at android.app.servertransaction.ActivityTransactionItem.execute(ActivityTransactionItem.java:63)
                 	at android.app.servertransaction.TransactionExecutor.executeLifecycleItem(TransactionExecutor.java:169)
                 	at android.app.servertransaction.TransactionExecutor.executeTransactionItems(TransactionExecutor.java:101)
                 	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:80)
                 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2823)
                 	at android.os.Handler.dispatchMessage(Handler.java:110)
                 	at android.os.Looper.loopOnce(Looper.java:248)
                 	at android.os.Looper.loop(Looper.java:338)
                 	at android.app.ActivityThread.main(ActivityThread.java:9067)
                 	at java.lang.reflect.Method.invoke(Native Method)
                 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
                 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:932)
10:01:26.278  D  visibilityChanged oldVisibility=true newVisibility=false
10:01:26.293  W  sendCancelIfRunning: isInProgress=false callback=androidx.navigationevent.OnBackInvokedInput$createOnBackAnimationCallback$1@500bb7a
10:01:59.513  I  AssetManager2(0x7e2f525a8f18) locale list changing from [] to [en-US]
10:01:59.567  W  No stored state - unable to handle response
10:01:59.574  D  Skipping stats log for color mode
10:01:59.624  D  Registering broadcast receiver for Action: "android.os.action.POWER_SAVE_MODE_CHANGED" (flags=null)
10:01:59.625  D  Registering broadcast receiver for Action: "android.net.conn.RESTRICT_BACKGROUND_CHANGED" (flags=null)
10:01:59.626  D  Registering broadcast receiver for Action: "android.intent.action.DEVICE_STORAGE_OK" (flags=null)
10:01:59.627  D  Registering broadcast receiver for Scheme: "package" (flags=null)
10:01:59.629  D  Registering broadcast receiver for Scheme: "package" (flags=null)
10:01:59.631  D  Looking up setting max_accounts
10:01:59.632  V  SharedPreferencesProvider: max_accounts = null
10:01:59.632  V  DefaultsProvider: max_accounts = null
10:01:59.632  D  Looked up setting max_accounts -> no result
10:01:59.719  D  Looking up setting preferred_tasks_provider
10:01:59.720  V  SharedPreferencesProvider: preferred_tasks_provider = org.dmfs.tasks
10:01:59.720  D  Looked up setting preferred_tasks_provider -> org.dmfs.tasks
10:01:59.733  V  Sync pending(Account {name=test, type=bitfire.at.davdroid}, com.android.calendar) = false
10:01:59.740  V  Sync pending(Account {name=test, type=bitfire.at.davdroid}, org.dmfs.tasks) = false
10:01:59.775  D  hide(ime(), fromIme=false)
10:01:59.775  I  at.bitfire.davdroid:d0cd4466: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN

Full logs for launch from DAVx⁵ (correct service detection)

10:03:14.797  W  Did not understand login intent: Intent { xflg=0x4 cmp=at.bitfire.davdroid/.ui.setup.LoginActivity }
10:03:15.079  D  hide(ime(), fromIme=false)
10:03:15.079  I  at.bitfire.davdroid:5e82f497: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN
10:03:15.444  D  visibilityChanged oldVisibility=true newVisibility=false
10:03:15.458  D  endAllActiveAnimators on 0x7e31025acde0 (UnprojectedRipple) with handle 0x7e30125dda00
10:03:15.467  D  Unregistering broadcast receiver for Scheme: "package"
10:03:15.469  D  Unregistering broadcast receiver for Scheme: "package"
10:03:15.471  D  Unregistering broadcast receiver for Action: "android.intent.action.DEVICE_STORAGE_OK"
10:03:15.472  D  Unregistering broadcast receiver for Action: "android.net.conn.RESTRICT_BACKGROUND_CHANGED"
10:03:15.473  D  Unregistering broadcast receiver for Action: "android.os.action.POWER_SAVE_MODE_CHANGED"
10:03:17.696  D  StrictMode policy violation; ~duration=7 ms: android.os.strictmode.DiskReadViolation (Fix with AI)
                 	at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1728)
                 	at libcore.io.BlockGuardOs.access(BlockGuardOs.java:74)
                 	at libcore.io.ForwardingOs.access(ForwardingOs.java:128)
                 	at android.app.ActivityThread$AndroidOs.access(ActivityThread.java:8944)
                 	at java.io.UnixFileSystem.checkAccess(UnixFileSystem.java:332)
                 	at java.io.File.exists(File.java:829)
                 	at org.chromium.chrome.browser.customtabs.CustomTabsConnection.o(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:37)
                 	at org.chromium.chrome.browser.customtabs.CustomTabsConnection.P(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:1)
                 	at uv5.r(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:21)
                 	at cw5.onTransact(chromium-TrichromeChromeGoogle6432.aab-stable-744417138:1101)
                 	at android.os.Binder.execTransactInternal(Binder.java:1421)
                 	at android.os.Binder.execTransact(Binder.java:1365)
                 # via Binder call with stack:
                 	at android.os.StrictMode.readAndHandleBinderCallViolations(StrictMode.java:2671)
                 	at android.os.Parcel.readExceptionCode(Parcel.java:3285)
                 	at android.os.Parcel.readException(Parcel.java:3246)
                 	at android.support.customtabs.ICustomTabsService$Stub$Proxy.warmup(ICustomTabsService.java:347)
                 	at androidx.browser.customtabs.CustomTabsClient.warmup(CustomTabsClient.java:236)
                 	at net.openid.appauth.browser.CustomTabManager$1.onCustomTabsServiceConnected(CustomTabManager.java:84)
                 	at androidx.browser.customtabs.CustomTabsServiceConnection.onServiceConnected(CustomTabsServiceConnection.java:54)
                 	at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:2235)
                 	at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:2268)
                 	at android.os.Handler.handleCallback(Handler.java:995)
                 	at android.os.Handler.dispatchMessage(Handler.java:103)
                 	at android.os.Looper.loopOnce(Looper.java:248)
                 	at android.os.Looper.loop(Looper.java:338)
                 	at android.app.ActivityThread.main(ActivityThread.java:9067)
                 	at java.lang.reflect.Method.invoke(Native Method)
                 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
                 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:932)
10:03:27.455  D  StrictMode policy violation: android.os.strictmode.UnsafeIntentLaunchViolation: Launch of unsafe intent: Intent { act=android.intent.action.VIEW dat=https://accounts.google.com/... xflg=0x4 pkg=com.android.chrome (has extras) } (Fix with AI)
                 	at android.os.StrictMode.onUnsafeIntentLaunch(StrictMode.java:2464)
                 	at android.content.Intent.prepareToLeaveProcess(Intent.java:13109)
                 	at android.content.Intent.prepareToLeaveProcess(Intent.java:13025)
                 	at android.content.Intent.prepareToLeaveProcess(Intent.java:13015)
                 	at android.app.Instrumentation.execStartActivity(Instrumentation.java:1994)
                 	at android.app.Activity.startActivityForResult(Activity.java:5997)
                 	at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.kt:694)
                 	at android.app.Activity.startActivityForResult(Activity.java:5954)
                 	at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.kt:679)
                 	at android.app.Activity.startActivity(Activity.java:6457)
                 	at android.app.Activity.startActivity(Activity.java:6424)
                 	at net.openid.appauth.AuthorizationManagementActivity.onResume(AuthorizationManagementActivity.java:228)
                 	at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1717)
                 	at android.app.Activity.performResume(Activity.java:9315)
                 	at android.app.ActivityThread.performResumeActivity(ActivityThread.java:5605)
                 	at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:5648)
                 	at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:73)
                 	at android.app.servertransaction.ActivityTransactionItem.execute(ActivityTransactionItem.java:63)
                 	at android.app.servertransaction.TransactionExecutor.executeLifecycleItem(TransactionExecutor.java:169)
                 	at android.app.servertransaction.TransactionExecutor.executeTransactionItems(TransactionExecutor.java:101)
                 	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:80)
                 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2823)
                 	at android.os.Handler.dispatchMessage(Handler.java:110)
                 	at android.os.Looper.loopOnce(Looper.java:248)
                 	at android.os.Looper.loop(Looper.java:338)
                 	at android.app.ActivityThread.main(ActivityThread.java:9067)
                 	at java.lang.reflect.Method.invoke(Native Method)
                 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
                 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:932)
10:03:28.143  D  visibilityChanged oldVisibility=true newVisibility=false
10:03:28.162  W  sendCancelIfRunning: isInProgress=false callback=androidx.navigationevent.OnBackInvokedInput$createOnBackAnimationCallback$1@52e58b3
10:03:28.166  D  endAllActiveAnimators on 0x7e31025f0dd0 (UnprojectedRipple) with handle 0x7e30125e75d0
10:03:34.170  I  AssetManager2(0x7e2f525b9ef8) locale list changing from [] to [en-US]
10:03:34.434  D  hide(ime(), fromIme=false)
10:03:34.434  I  at.bitfire.davdroid:2cf0664c: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN
10:03:34.472  I  Will set User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:34.864  W  sendCancelIfRunning: isInProgress=false callback=android.app.Activity$$ExternalSyntheticLambda0@a328ae9
10:03:34.868  D  Skipping stats log for color mode
10:03:35.066  I  hiddenapi: Accessing hidden method Ljava/security/spec/ECParameterSpec;->getCurveName()Ljava/lang/String; (runtime_flags=0, domain=core-platform, api=unsupported) from Lorg/conscrypt/Platform; (domain=app) using reflection: allowed
10:03:35.072  I  Using Conscrypt/2.5.3 for TLS
10:03:35.073  I  Enabled protocols: TLSv1.2, TLSv1.3
10:03:35.074  I  Enabled ciphers: TLS_AES_128_GCM_SHA256, TLS_AES_256_GCM_SHA384, TLS_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV
10:03:35.121  D  Looking up setting proxy_type
10:03:35.122  V  SharedPreferencesProvider: proxy_type = null
10:03:35.123  V  DefaultsProvider: proxy_type = -1
10:03:35.124  D  Looked up setting proxy_type -> -1
10:03:35.142  D  Loaded 0 trusted certificate(s)
10:03:35.144  D  Looking up setting distrust_system_certs
10:03:35.145  V  SharedPreferencesProvider: distrust_system_certs = false
10:03:35.146  D  Looked up setting distrust_system_certs -> false
10:03:35.161  I  Finding initial carddav service configuration
10:03:35.185  I  Checking user-given URL: https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user
10:03:35.215  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:35.349  I  hiddenapi: Accessing hidden method Ljava/security/spec/ECParameterSpec;->setCurveName(Ljava/lang/String;)V (runtime_flags=0, domain=core-platform, api=unsupported) from Lorg/conscrypt/Platform; (domain=app) using reflection: allowed
10:03:35.369  V  --> PROPFIND https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user h2
10:03:35.370  V  Depth: 0
10:03:35.370  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:35.370  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:35.371  V  Accept-Encoding: br, gzip
10:03:35.371  V  Authorization: ██
10:03:35.371  V  Content-Type: application/xml; charset=utf-8
10:03:35.372  V  Content-Length: 290
10:03:35.372  V  Host: apidata.googleusercontent.com
10:03:35.372  V  Connection: Keep-Alive
10:03:35.373  V  
10:03:35.374  V  <?xml version='1.0' encoding='UTF-8' ?><propfind xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav" xmlns:CARD="urn:ietf:params:xml:ns:carddav"><prop><resourcetype /><displayname /><current-user-principal /><CARD:addressbook-home-set /><CARD:addressbook-description /></prop></propfind>
10:03:35.374  V  --> END PROPFIND (290-byte body)
10:03:35.770  V  <-- 207 https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user (395ms)
10:03:35.770  V  pragma: no-cache
10:03:35.770  V  content-type: text/xml; charset=UTF-8
10:03:35.771  V  date: Wed, 28 Jan 2026 09:03:39 GMT
10:03:35.771  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:35.771  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:35.771  V  dav: 1, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-proxy
10:03:35.772  V  content-length: 413
10:03:35.772  V  vary: Origin
10:03:35.772  V  vary: X-Origin
10:03:35.773  V  vary: Referer
10:03:35.773  V  content-encoding: gzip
10:03:35.773  V  server: ESF
10:03:35.774  V  x-xss-protection: 0
10:03:35.774  V  x-frame-options: SAMEORIGIN
10:03:35.774  V  x-content-type-options: nosniff
10:03:35.775  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:35.775  V  x-l2-request-path: l2-managed-14
10:03:35.777  V  
10:03:35.778  V  <?xml version="1.0" encoding="UTF-8"?>
                 <D:multistatus xmlns:D="DAV:" xmlns:caldav="urn:ietf:params:xml:ns:caldav" xmlns:cs="http://calendarserver.org/ns/" xmlns:ical="http://apple.com/ns/ical/">
                  <D:response xmlns:carddav="urn:ietf:params:xml:ns:carddav" xmlns:cm="http://cal.me.com/_namespace/" xmlns:md="urn:mobileme:davservices">
                   <D:href>/caldav/v2/example@gmail.com/user</D:href>
                   <D:propstat>
                    <D:status>HTTP/1.1 200 OK</D:status>
                    <D:prop>
                     <D:displayname>Example</D:displayname>
                     <D:resourcetype>
                      <D:collection/>
                      <D:principal/>
                     </D:resourcetype>
                    </D:prop>
                   </D:propstat>
                   <D:propstat>
                    <D:status>HTTP/1.1 404 Not Found</D:status>
                    <D:prop>
                     <D:current-user-principal/>
                     <carddav:addressbook-home-set/>
                     <carddav:addressbook-description/>
                    </D:prop>
                   </D:propstat>
                  </D:response>
                 </D:multistatus>
                 
10:03:35.778  V  <-- END HTTP (401ms, 865-byte, 413-gzipped-byte body)
10:03:35.786  I  Registering DAV property factories
10:03:35.789  D  Registering at.bitfire.dav4jvm.property.webdav.AddMember$Factory for DAV::add-member
10:03:35.789  D  Registering at.bitfire.dav4jvm.property.carddav.AddressbookDescription$Factory for urn:ietf:params:xml:ns:carddav:addressbook-description
10:03:35.789  D  Registering at.bitfire.dav4jvm.property.carddav.AddressbookHomeSet$Factory for urn:ietf:params:xml:ns:carddav:addressbook-home-set
10:03:35.789  D  Registering at.bitfire.dav4jvm.property.carddav.AddressData$Factory for urn:ietf:params:xml:ns:carddav:address-data
10:03:35.789  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarColor$Factory for http://apple.com/ns/ical/:calendar-color
10:03:35.790  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarData$Factory for urn:ietf:params:xml:ns:caldav:calendar-data
10:03:35.790  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarDescription$Factory for urn:ietf:params:xml:ns:caldav:calendar-description
10:03:35.790  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarHomeSet$Factory for urn:ietf:params:xml:ns:caldav:calendar-home-set
10:03:35.790  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarProxyReadFor$Factory for http://calendarserver.org/ns/:calendar-proxy-read-for
10:03:35.791  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarProxyWriteFor$Factory for http://calendarserver.org/ns/:calendar-proxy-write-for
10:03:35.791  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarTimezone$Factory for urn:ietf:params:xml:ns:caldav:calendar-timezone
10:03:35.791  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarTimezoneId$Factory for urn:ietf:params:xml:ns:caldav:calendar-timezone-id
10:03:35.792  D  Registering at.bitfire.dav4jvm.property.caldav.CalendarUserAddressSet$Factory for urn:ietf:params:xml:ns:caldav:calendar-user-address-set
10:03:35.792  D  Registering at.bitfire.dav4jvm.property.webdav.CreationDate$Factory for DAV::creationdate
10:03:35.793  D  Registering at.bitfire.dav4jvm.property.webdav.CurrentUserPrincipal$Factory for DAV::current-user-principal
10:03:35.793  D  Registering at.bitfire.dav4jvm.property.webdav.CurrentUserPrivilegeSet$Factory for DAV::current-user-privilege-set
10:03:35.793  D  Registering at.bitfire.dav4jvm.property.webdav.DisplayName$Factory for DAV::displayname
10:03:35.793  D  Registering at.bitfire.dav4jvm.property.webdav.GetContentLength$Factory for DAV::getcontentlength
10:03:35.793  D  Registering at.bitfire.dav4jvm.property.webdav.GetContentType$Factory for DAV::getcontenttype
10:03:35.794  D  Registering at.bitfire.dav4jvm.property.caldav.GetCTag$Factory for http://calendarserver.org/ns/:getctag
10:03:35.794  D  Registering at.bitfire.dav4jvm.property.webdav.GetETag$Factory for DAV::getetag
10:03:35.794  D  Registering at.bitfire.dav4jvm.property.webdav.GetLastModified$Factory for DAV::getlastmodified
10:03:35.795  D  Registering at.bitfire.dav4jvm.property.webdav.GroupMembership$Factory for DAV::group-membership
10:03:35.795  D  Registering at.bitfire.dav4jvm.property.caldav.MaxResourceSize$Factory for urn:ietf:params:xml:ns:caldav:max-resource-size
10:03:35.795  D  Registering at.bitfire.dav4jvm.property.carddav.MaxResourceSize$Factory for urn:ietf:params:xml:ns:carddav:max-resource-size
10:03:35.795  D  Registering at.bitfire.dav4jvm.property.webdav.Owner$Factory for DAV::owner
10:03:35.796  D  Registering at.bitfire.dav4jvm.property.push.PushMessage$Factory for https://bitfire.at/webdav-push:push-message
10:03:35.796  D  Registering at.bitfire.dav4jvm.property.push.PushRegister$Factory for https://bitfire.at/webdav-push:push-register
10:03:35.796  D  Registering at.bitfire.dav4jvm.property.push.PushTransports$Factory for https://bitfire.at/webdav-push:transports
10:03:35.796  D  Registering at.bitfire.dav4jvm.property.webdav.QuotaAvailableBytes$Factory for DAV::quota-available-bytes
10:03:35.797  D  Registering at.bitfire.dav4jvm.property.webdav.QuotaUsedBytes$Factory for DAV::quota-used-bytes
10:03:35.797  D  Registering at.bitfire.dav4jvm.property.webdav.ResourceType$Factory for DAV::resourcetype
10:03:35.797  D  Registering at.bitfire.dav4jvm.property.caldav.ScheduleTag$Factory for urn:ietf:params:xml:ns:caldav:schedule-tag
10:03:35.798  D  Registering at.bitfire.dav4jvm.property.caldav.Source$Factory for http://calendarserver.org/ns/:source
10:03:35.798  D  Registering at.bitfire.dav4jvm.property.push.Subscription$Factory for https://bitfire.at/webdav-push:subscription
10:03:35.798  D  Registering at.bitfire.dav4jvm.property.carddav.SupportedAddressData$Factory for urn:ietf:params:xml:ns:carddav:supported-address-data
10:03:35.798  D  Registering at.bitfire.dav4jvm.property.caldav.SupportedCalendarComponentSet$Factory for urn:ietf:params:xml:ns:caldav:supported-calendar-component-set
10:03:35.799  D  Registering at.bitfire.dav4jvm.property.caldav.SupportedCalendarData$Factory for urn:ietf:params:xml:ns:caldav:supported-calendar-data
10:03:35.799  D  Registering at.bitfire.dav4jvm.property.webdav.SupportedReportSet$Factory for DAV::supported-report-set
10:03:35.799  D  Registering at.bitfire.dav4jvm.property.webdav.SyncToken$Factory for DAV::sync-token
10:03:35.799  D  Registering at.bitfire.dav4jvm.property.push.Topic$Factory for https://bitfire.at/webdav-push:topic
10:03:35.799  D  Registering at.bitfire.dav4jvm.property.push.WebPushSubscription$Factory for https://bitfire.at/webdav-push:web-push-subscription
10:03:35.802  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:35.804  V  --> OPTIONS https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ h2
10:03:35.805  V  Content-Length: 0
10:03:35.805  V  Accept-Encoding: identity
10:03:35.805  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:35.806  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:35.806  V  Authorization: ██
10:03:35.806  V  Host: apidata.googleusercontent.com
10:03:35.806  V  Connection: Keep-Alive
10:03:35.807  V  --> END OPTIONS
10:03:36.118  V  <-- 200 https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ (310ms)
10:03:36.118  V  pragma: no-cache
10:03:36.118  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:36.118  V  dav: 1, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-proxy
10:03:36.119  V  allow: OPTIONS, PROPFIND, REPORT
10:03:36.119  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:36.119  V  content-type: text/plain
10:03:36.120  V  date: Wed, 28 Jan 2026 09:03:39 GMT
10:03:36.120  V  content-length: 0
10:03:36.120  V  vary: Origin
10:03:36.121  V  vary: X-Origin
10:03:36.121  V  vary: Referer
10:03:36.121  V  server: ESF
10:03:36.122  V  x-xss-protection: 0
10:03:36.122  V  x-frame-options: SAMEORIGIN
10:03:36.122  V  x-content-type-options: nosniff
10:03:36.123  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:36.123  V  x-l2-request-path: l2-managed-14
10:03:36.124  V  <-- END HTTP (316ms, 0-byte body)
10:03:36.125  W  Principal https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ doesn't provide carddav service
10:03:36.127  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:36.128  V  --> PROPFIND https://apidata.googleusercontent.com/.well-known/carddav h2
10:03:36.129  V  Depth: 0
10:03:36.129  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:36.129  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:36.129  V  Accept-Encoding: br, gzip
10:03:36.130  V  Authorization: ██
10:03:36.130  V  Content-Type: application/xml; charset=utf-8
10:03:36.131  V  Content-Length: 198
10:03:36.131  V  Host: apidata.googleusercontent.com
10:03:36.131  V  Connection: Keep-Alive
10:03:36.132  V  
10:03:36.132  V  <?xml version='1.0' encoding='UTF-8' ?><propfind xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav" xmlns:CARD="urn:ietf:params:xml:ns:carddav"><prop><current-user-principal /></prop></propfind>
10:03:36.132  V  --> END PROPFIND (198-byte body)
10:03:36.201  V  <-- 301 https://apidata.googleusercontent.com/.well-known/carddav (68ms)
10:03:36.201  V  content-type: text/plain; charset=UTF-8
10:03:36.202  V  x-content-type-options: nosniff
10:03:36.202  V  x-xss-protection: 1; mode=block
10:03:36.202  V  location: /carddav/v1/principals/example@gmail.com/lists/default/
10:03:36.203  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:36.203  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:36.203  V  x-frame-options: SAMEORIGIN
10:03:36.204  V  pragma: no-cache
10:03:36.204  V  vary: Origin
10:03:36.204  V  vary: X-Origin
10:03:36.205  V  vary: Referer
10:03:36.205  V  date: Wed, 28 Jan 2026 09:03:39 GMT
10:03:36.205  V  server: ESF
10:03:36.206  V  content-length: 0
10:03:36.206  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:36.207  V  <-- END HTTP (74ms, 0-byte body)
10:03:36.209  D  Redirected, new location = https://apidata.googleusercontent.com/carddav/v1/principals/example@gmail.com/lists/default/
10:03:36.211  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:36.213  V  --> PROPFIND https://apidata.googleusercontent.com/carddav/v1/principals/example@gmail.com/lists/default/ h2
10:03:36.213  V  Depth: 0
10:03:36.214  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:36.214  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:36.215  V  Accept-Encoding: br, gzip
10:03:36.215  V  Authorization: ██
10:03:36.216  V  Content-Type: application/xml; charset=utf-8
10:03:36.217  V  Content-Length: 198
10:03:36.217  V  Host: apidata.googleusercontent.com
10:03:36.217  V  Connection: Keep-Alive
10:03:36.218  V  
10:03:36.219  V  <?xml version='1.0' encoding='UTF-8' ?><propfind xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav" xmlns:CARD="urn:ietf:params:xml:ns:carddav"><prop><current-user-principal /></prop></propfind>
10:03:36.219  V  --> END PROPFIND (198-byte body)
10:03:36.282  V  <-- 207 https://apidata.googleusercontent.com/carddav/v1/principals/example@gmail.com/lists/default/ (61ms)
10:03:36.283  V  content-type: text/xml; charset=UTF-8
10:03:36.283  V  x-xss-protection: 1; mode=block
10:03:36.284  V  x-frame-options: SAMEORIGIN
10:03:36.285  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:36.285  V  x-content-type-options: nosniff
10:03:36.286  V  pragma: no-cache
10:03:36.286  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:36.287  V  dav: 1, 2, 3, addressbook, access-control
10:03:36.287  V  vary: Origin
10:03:36.288  V  vary: X-Origin
10:03:36.288  V  vary: Referer
10:03:36.289  V  date: Wed, 28 Jan 2026 09:03:39 GMT
10:03:36.289  V  server: ESF
10:03:36.290  V  content-length: 590
10:03:36.290  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:36.292  V  
10:03:36.293  V  <?xml version="1.0" encoding="UTF-8"?>
                 <d:multistatus xmlns:cal="urn:ietf:params:xml:ns:caldav" xmlns:card="urn:ietf:params:xml:ns:carddav" xmlns:cs="http://calendarserver.org/ns/" xmlns:d="DAV:" xmlns:ical="http://apple.com/ns/ical/">
                  <d:response>
                   <d:href>/carddav/v1/principals/example@gmail.com/lists/default/</d:href>
                   <d:propstat>
                    <d:status>HTTP/1.1 200 OK</d:status>
                    <d:prop>
                     <d:current-user-principal>
                      <d:href>/carddav/v1/principals/example@gmail.com</d:href>
                     </d:current-user-principal>
                    </d:prop>
                   </d:propstat>
                  </d:response>
                 </d:multistatus>
10:03:36.294  V  <-- END HTTP (71ms, 590-byte body)
10:03:36.298  I  Found current-user-principal: https://apidata.googleusercontent.com/carddav/v1/principals/example@gmail.com
10:03:36.300  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:36.303  V  --> OPTIONS https://apidata.googleusercontent.com/carddav/v1/principals/example@gmail.com h2
10:03:36.304  V  Content-Length: 0
10:03:36.304  V  Accept-Encoding: identity
10:03:36.305  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:36.306  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:36.306  V  Authorization: ██
10:03:36.306  V  Host: apidata.googleusercontent.com
10:03:36.307  V  Connection: Keep-Alive
10:03:36.307  V  --> END OPTIONS
10:03:36.378  V  <-- 200 https://apidata.googleusercontent.com/carddav/v1/principals/example@gmail.com (70ms)
10:03:36.379  V  content-type: text/plain; charset=UTF-8
10:03:36.379  V  content-disposition: attachment
10:03:36.379  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:36.380  V  x-content-type-options: nosniff
10:03:36.380  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:36.380  V  allow: UNLOCK,MKCOL,PROPFIND,LOCK,PROPPATCH,OPTIONS,ACL,PUT,GET,REPORT,POST
10:03:36.381  V  dav: 1, 2, 3, addressbook, access-control
10:03:36.381  V  x-xss-protection: 1; mode=block
10:03:36.381  V  x-frame-options: SAMEORIGIN
10:03:36.382  V  pragma: no-cache
10:03:36.382  V  vary: Origin
10:03:36.382  V  vary: X-Origin
10:03:36.383  V  vary: Referer
10:03:36.383  V  date: Wed, 28 Jan 2026 09:03:39 GMT
10:03:36.384  V  server: ESF
10:03:36.384  V  content-length: 0
10:03:36.385  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:36.386  V  <-- END HTTP (77ms, 0-byte body)
10:03:36.387  I  Finding initial caldav service configuration
10:03:36.389  I  Checking user-given URL: https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user
10:03:36.391  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:36.394  V  --> PROPFIND https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user h2
10:03:36.394  V  Depth: 0
10:03:36.395  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:36.395  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:36.395  V  Accept-Encoding: br, gzip
10:03:36.396  V  Authorization: ██
10:03:36.396  V  Content-Type: application/xml; charset=utf-8
10:03:36.396  V  Content-Length: 435
10:03:36.397  V  Host: apidata.googleusercontent.com
10:03:36.397  V  Connection: Keep-Alive
10:03:36.398  V  
10:03:36.398  V  <?xml version='1.0' encoding='UTF-8' ?><propfind xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav" xmlns:CARD="urn:ietf:params:xml:ns:carddav"><prop><resourcetype /><displayname /><current-user-principal /><current-user-privilege-set /><CAL:calendar-home-set /><CAL:supported-calendar-component-set /><n0:calendar-color xmlns:n0="http://apple.com/ns/ical/" /><CAL:calendar-description /><CAL:calendar-timezone /></prop></propfind>
10:03:36.399  V  --> END PROPFIND (435-byte body)
10:03:36.576  V  <-- 207 https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user (176ms)
10:03:36.576  V  date: Wed, 28 Jan 2026 09:03:40 GMT
10:03:36.577  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:36.577  V  dav: 1, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-proxy
10:03:36.578  V  pragma: no-cache
10:03:36.578  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:36.578  V  content-length: 467
10:03:36.579  V  content-type: text/xml; charset=UTF-8
10:03:36.579  V  vary: Origin
10:03:36.580  V  vary: X-Origin
10:03:36.580  V  vary: Referer
10:03:36.581  V  content-encoding: gzip
10:03:36.581  V  server: ESF
10:03:36.581  V  x-xss-protection: 0
10:03:36.582  V  x-frame-options: SAMEORIGIN
10:03:36.582  V  x-content-type-options: nosniff
10:03:36.583  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:36.583  V  x-l2-request-path: l2-managed-14
10:03:36.585  V  
10:03:36.585  V  <?xml version="1.0" encoding="UTF-8"?>
                 <D:multistatus xmlns:D="DAV:" xmlns:caldav="urn:ietf:params:xml:ns:caldav" xmlns:cs="http://calendarserver.org/ns/" xmlns:ical="http://apple.com/ns/ical/">
                  <D:response xmlns:carddav="urn:ietf:params:xml:ns:carddav" xmlns:cm="http://cal.me.com/_namespace/" xmlns:md="urn:mobileme:davservices">
                   <D:href>/caldav/v2/example@gmail.com/user</D:href>
                   <D:propstat>
                    <D:status>HTTP/1.1 200 OK</D:status>
                    <D:prop>
                     <D:displayname>Example</D:displayname>
                     <caldav:calendar-home-set>
                      <D:href>/caldav/v2/example%40gmail.com/</D:href>
                     </caldav:calendar-home-set>
                     <D:resourcetype>
                      <D:collection/>
                      <D:principal/>
                     </D:resourcetype>
                    </D:prop>
                   </D:propstat>
                   <D:propstat>
                    <D:status>HTTP/1.1 404 Not Found</D:status>
                    <D:prop>
                     <D:current-user-principal/>
                     <D:current-user-privilege-set/>
                     <caldav:supported-calendar-component-set/>
                     <ical:calendar-color/>
                     <caldav:calendar-description/>
                     <caldav:calendar-timezone/>
                    </D:prop>
                   </D:propstat>
                  </D:response>
                 </D:multistatus>
                 
10:03:36.585  V  <-- END HTTP (184ms, 1090-byte, 467-gzipped-byte body)
10:03:36.589  I  Found home-set of type urn:ietf:params:xml:ns:caldav:calendar at https://apidata.googleusercontent.com/caldav/v2/example%40gmail.com/
10:03:36.591  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:36.594  V  --> OPTIONS https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ h2
10:03:36.595  V  Content-Length: 0
10:03:36.596  V  Accept-Encoding: identity
10:03:36.596  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:36.597  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:36.597  V  Authorization: ██
10:03:36.597  V  Host: apidata.googleusercontent.com
10:03:36.598  V  Connection: Keep-Alive
10:03:36.598  V  --> END OPTIONS
10:03:36.947  V  <-- 200 https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ (347ms)
10:03:36.948  V  content-type: text/plain
10:03:36.948  V  dav: 1, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-proxy
10:03:36.949  V  allow: OPTIONS, PROPFIND, REPORT
10:03:36.949  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:36.950  V  date: Wed, 28 Jan 2026 09:03:40 GMT
10:03:36.950  V  content-length: 0
10:03:36.951  V  pragma: no-cache
10:03:36.951  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:36.952  V  vary: Origin
10:03:36.952  V  vary: X-Origin
10:03:36.953  V  vary: Referer
10:03:36.953  V  server: ESF
10:03:36.953  V  x-xss-protection: 0
10:03:36.954  V  x-frame-options: SAMEORIGIN
10:03:36.954  V  x-content-type-options: nosniff
10:03:36.955  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:36.955  V  x-l2-request-path: l2-managed-14
10:03:36.957  V  <-- END HTTP (357ms, 0-byte body)
10:03:36.960  V  Using cached AuthState
                 	PARAMETER #1 = {"refreshToken":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","lastAuthorizationResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","responseType":"code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","login_hint":"example@gmail.com","scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/carddav","ui_locales":"en-US","state":"###","nonce":"###","codeVerifier":"###","codeVerifierChallenge":"###","codeVerifierChallengeMethod":"S256","additionalParameters":{}},"state":"###","code":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additional_parameters":{}},"mLastTokenResponse":{"request":{"configuration":{"authorizationEndpoint":"https:\/\/accounts.google.com\/o\/oauth2\/v2\/auth","tokenEndpoint":"https:\/\/oauth2.googleapis.com\/token"},"clientId":"###.apps.googleusercontent.com","nonce":"###","grantType":"authorization_code","redirectUri":"at.bitfire.davdroid:\/oauth2\/redirect","authorizationCode":"###","codeVerifier":"###","additionalParameters":{}},"token_type":"Bearer","access_token":"###","expires_at":###,"refresh_token":"###","scope":"https:\/\/www.googleapis.com\/auth\/carddav https:\/\/www.googleapis.com\/auth\/calendar","additionalParameters":{}}}
10:03:36.963  V  --> PROPFIND https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ h2
10:03:36.964  V  Depth: 0
10:03:36.964  V  User-Agent: DAVx5/4.5.9-alpha.1-ose (dav4jvm; okhttp/5.3.2) Android/16
10:03:36.965  V  Accept-Language: en-US, en;q=0.7, *;q=0.5
10:03:36.965  V  Accept-Encoding: br, gzip
10:03:36.966  V  Authorization: ██
10:03:36.966  V  Content-Type: application/xml; charset=utf-8
10:03:36.967  V  Content-Length: 205
10:03:36.967  V  Host: apidata.googleusercontent.com
10:03:36.968  V  Connection: Keep-Alive
10:03:36.969  V  
10:03:36.970  V  <?xml version='1.0' encoding='UTF-8' ?><propfind xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav" xmlns:CARD="urn:ietf:params:xml:ns:carddav"><prop><CAL:calendar-user-address-set /></prop></propfind>
10:03:36.971  V  --> END PROPFIND (205-byte body)
10:03:37.061  I  Background concurrent mark compact GC freed 7184KB AllocSpace bytes, 10(220KB) LOS objects, 49% free, 9292KB/18MB, paused 438us,3.997ms total 101.700ms
10:03:37.183  V  <-- 207 https://apidata.googleusercontent.com/caldav/v2/example@gmail.com/user/ (211ms)
10:03:37.183  V  date: Wed, 28 Jan 2026 09:03:40 GMT
10:03:37.184  V  expires: Mon, 01 Jan 1990 00:00:00 GMT
10:03:37.184  V  pragma: no-cache
10:03:37.185  V  dav: 1, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-proxy
10:03:37.185  V  content-length: 343
10:03:37.185  V  cache-control: no-cache, no-store, max-age=0, must-revalidate
10:03:37.186  V  content-type: text/xml; charset=UTF-8
10:03:37.186  V  vary: Origin
10:03:37.186  V  vary: X-Origin
10:03:37.187  V  vary: Referer
10:03:37.187  V  content-encoding: gzip
10:03:37.187  V  server: ESF
10:03:37.188  V  x-xss-protection: 0
10:03:37.188  V  x-frame-options: SAMEORIGIN
10:03:37.189  V  x-content-type-options: nosniff
10:03:37.189  V  alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
10:03:37.189  V  x-l2-request-path: l2-managed-14
10:03:37.191  V  
10:03:37.192  V  <?xml version="1.0" encoding="UTF-8"?>
                 <D:multistatus xmlns:D="DAV:" xmlns:caldav="urn:ietf:params:xml:ns:caldav" xmlns:cs="http://calendarserver.org/ns/" xmlns:ical="http://apple.com/ns/ical/">
                  <D:response xmlns:carddav="urn:ietf:params:xml:ns:carddav" xmlns:cm="http://cal.me.com/_namespace/" xmlns:md="urn:mobileme:davservices">
                   <D:href>/caldav/v2/example@gmail.com/user/</D:href>
                   <D:propstat>
                    <D:status>HTTP/1.1 200 OK</D:status>
                    <D:prop>
                     <caldav:calendar-user-address-set>
                      <D:href>/caldav/v2/example%40gmail.com/user/</D:href>
                      <D:href>mailto:example@gmail.com</D:href>
                     </caldav:calendar-user-address-set>
                    </D:prop>
                   </D:propstat>
                  </D:response>
                 </D:multistatus>
                 
10:03:37.192  V  <-- END HTTP (219ms, 718-byte, 343-gzipped-byte body)
10:03:37.405  D  Looking up setting contact_group_method
10:03:37.406  V  SharedPreferencesProvider: contact_group_method = null
10:03:37.406  V  DefaultsProvider: contact_group_method = null
10:03:37.406  D  Looked up setting contact_group_method -> no result

[rfc2822]

Can reproduce that.

10:01:59.567 W No stored state - unable to handle response

Seems to be the key