Account Creation: enabling email communication upon new user creation triggers sign in failure

[functionzz]

Summary

Upon creating a new user through the "Sign In" user flow, the user has an option to click "Enable Email Communications". When that is clicked, a Sign In failure is registered.

Additional Context

User creation, before click:

After click:

[mathjazz]

Noting that Email communication (AKA News and Updates in Settings) are enabled after clicking the button.

[functionzz]

This is fixed through #3867, so I will close the issue.