Help! Google Api login screen error -- "non-compliance with Google OAuth 2.0 Policy"

How can I fix this error on the login screen?

Authorization Error
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. \n\nIf you're the app developer, register the redirect URI in the Google Cloud Console.
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Hey @AnnaO and welcome back!

I did some digging and found a post that may help your issue:

Let me know if this helps!