🔔 Note: This error typically occurs when your Google Workspace administrator has restricted third-party app access or enabled additional security controls that prevent Mailbutler from accessing Gmail.
Step 1: Open the OAuth app settings
Go to the OAuth app settings page in your Google Admin Console.
Step 2: Add Mailbutler's App ID
Add the following App ID:
286484897993-k53m0622cdbc3b563fkrq5ig0d4gnhpf.apps.googleusercontent.com
Step 3: Approve the required scopes
Allow the following scopes:
💡 Good to know: Google provides additional guidance on managing third-party app access in Google Workspace. See Google's documentation for details.