What should I do if a third-party Android app trying to integrate with Google services displays a 403 error?

If a third-party app shows a 403 error when integrating with Google services: 1. **Check app permissions:** Ensure the third-party app has all necessary permissions granted on your device to access Google-related services (e.g., contacts, calendar). 2. **Re-link account:** Within the third-party app, try disconnecting and then re-connecting your Google account. 3. **Update the app:** Make sure the third-party app is updated to its latest version, as developers often fix integration bugs. 4. **Google Account Permissions:** Visit your Google Account's security settings (myaccount.google.com/permissions) to review and potentially revoke access for the third-party app, then attempt to re-authorize it.