Error: “Not found” when authorizing X while setting up credentials on a self-hosted n8n instance

Questions
1

Hi everyone, I’m encountering an issue while trying to authorize X credentials in n8n. After clicking the “Authorize App” button for a new credential (OAuth2-based), I get the following error:

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Here’s some context:

  • The credential is for X
  • I’ve double-checked the client ID, secret, and scopes
  • The OAuth Redirect URL is set to:
    https://n8n-[xxxx].onrender.com/rest/oauth2-credential/callback
    • I’ve already:
    • Revoked app permissions and retried
    • Deleted and recreated both the app and credentials
    • Updated the client ID and secret
  • Still getting the same “Not found” error when attempting to authorize

Is there anything I might be missing in the configuration, or has anyone else encountered this with a self-hosted setup?

Any guidance would be appreciated!

2

Hi, Please don’t create multiple questions for the same issue.

Reg,
J.

3

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