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Gmail Trigger node common issues#

Here are some common errors and issues with the Gmail Trigger node and steps to resolve or troubleshoot them.

401 unauthorized error#

The full text of the error looks like this:

1
401 - {"error":"unauthorized_client","error_description":"Client is unauthorized to retrieve access tokens using this method, or client not authorized for any of the scopes requested."}

This error occurs when there's an issue with the credential you're using and its scopes or permissions.

To resolve:

  1. For OAuth2 credentials, make sure you've enabled the Gmail API in APIs & Services > Library. Refer to Google OAuth2 Single Service - Enable APIs for more information.
  2. For Service Account credentials:
    1. Enable domain-wide delegation.
    2. Make sure you add the Gmail API as part of the domain-wide delegation configuration.