How to resolve Google drive connection issue with the older versions less than 5.0
For packages less than 5.0 steps followed to resolve the issue:
1. Add lighting Page URL and classic VF page URL in both Trusted URL and Remote site settings.
Getting the Classic URL : Switch to the classic UI of Salesforce , Open XfilesPro Application in classic mode and copy the domian url like below and share this URL to support@xfilespro.com
2. Upgrade package to greater than 5.0.
3. Configure new storage setup. (If GDrive is used the files in salesforce will be synced back ).
4. Reconfigure all objects one by one.
For other Storage types follow the refresh token steps after the upgrade.