Getting Error on verifyAuthenticationResponse as undefined (reading 'counter')

[Usama-Akbar]

First, I registered the user with a passkey and then verified the registration and saved the credentials in DB
which worked fine
Then I tried to log in with that but after verification its giving me an error on verifyAuthenticationResponse function in @simplewebauthn/server library

and giving me the below :

=== VERIFICATION ERROR ===
Error message: Cannot read properties of undefined (reading 'counter')
Full error: TypeError: Cannot read properties of undefined (reading 'counter')
at verifyAuthenticationResponse (/Users/usamaakbar/Documents/Projects/ERS Tech/koker_backend/node_modules/@simplewebauthn/server/script/authentication/verifyAuthenticationResponse.js:147:36)
at async verifyAuthentication (/Users/usamaakbar/Documents/Projects/ERS Tech/koker_backend/controllers/user.js:234:26)
Error stack: TypeError: Cannot read properties of undefined (reading 'counter')

[kinghoddy]

i'm having this same issues
Seems like the verification code is stil expecting authenticator in the options not credential

[MasterKale]

Does this guidance help resolve the issue?

https://simplewebauthn.dev/docs/packages/server#typeerror-cannot-read-properties-of-undefined-reading-counter

If not then I'll need some sample code and package versions to continue troubleshooting what's going wrong.

[Usama-Akbar]

Yeah it can help you you can try this If it still doesn’t work than I can give the code snipper

…

On Sat, 25 Oct 2025 at 5:22 PM, Matthew Miller ***@***.***> wrote: Does this guidance help resolve the issue? https://simplewebauthn.dev/docs/packages/server#typeerror-cannot-read-properties-of-undefined-reading-counter If not then I'll need some sample code and package versions to continue troubleshooting what's going wrong. — Reply to this email directly, view it on GitHub <#701 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A4JHLGZTCHEUQ7SF7ZRBRXT3ZNTRXAVCNFSM6AAAAAB53S65EGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINZXHE3TCNA> . You are receiving this because you authored the thread.Message ID: ***@***.*** com>