Sign in with Google: Access blocked: This app’s request is invalid

jhaaaa · January 6, 2026, 5:38pm

A user tried to sign in with Google yesterday and let me know they are getting this error. I logged out and tried to get back in via sign in with Google and am getting the same error:

When I click error details, this is what I get:

Error 400: redirect_uri_mismatch
You can’t sign in to this app because it doesn’t comply with Google’s OAuth 2.0 policy.
If you’re the app developer, register the redirect URI in the Google Cloud Console.

Request details: redirect_uri=XMTP Improvement Forum flowName=GeneralOAuthFlow

Can you help us get sign in with google working again, please?

Thank you!

J-Ha

jhaaaa · January 8, 2026, 8:14pm

A friendly ping on this one, @pfaffman - any thoughts on this? Thank you, as always!

pfaffman · January 8, 2026, 8:17pm

You changed the URL of your site, so you need to update the Google App with the new URL.

You need to add the callback and url to the google config