Make errors / Auth
Failed to verify connection. Status Code Error: 400
Cause
The OAuth token for a connection expired or was revoked, most often because the Google Cloud app remains in 'Testing' (7-day token lifetime).
Fix
In Make Connections, reauthorize the affected connection. If it recurs weekly, set the Google OAuth consent screen from 'Testing' to 'In production'. For non-Google services, delete and recreate the connection with fresh credentials.
Part of the Automation Error Index — Make errors: browse all.
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