Google OAuth2 credential fails with generic "Unauthorized" — self-hosted Docker, redirect URI confirmed correct

[n8n]

Hey @Rasheed_Alia, while you wait for a response, here are some things that might help:

Suggested resources

Automatically matched to your question.

Docs:

• Google OAuth2 single service
• Google OAuth2 generic

Forum:

• Gmail OAuth2 fails with 401 Unauthorized at callback - manual token exchange succeeds
• Error: Bad Request with redirect uri mismatch - The error I am getting when trying to connect with a Google Drive Credential
• Connecting to Google with Self-Host on Railway

@Jorg_Koerfer, @thecookie3, @goodwill_p - you’ve helped with similar issues before, can you take a look?

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