GameSave Manager

The New Google Drive app (September 2021) is unable to be detected by GSM, and prevents previously configured Google Drive options (to the same folder) from being saved.

Game Save Manager was unable to detect Google Drive on your system.

As such, this feature cannot be enabled.

Happened to me too.

This is a known issue, which hasn't been addressed due to GSM not using the API for the service.
The workaround is to use the "Set a default Backup Directory" option from Program Settings -> Task Specific -> Backup Settings.