Too bad. For me, this problem is simply reproducable:
- add account for Google Drive
- everything works
- reboot server (ubuntu 22.04)
- “Your authentication token is invalid. Please try logging in again.”
- remove and readding the account fixes it until the next reboot.
Of course, Insync is unusable like this. I’m surprised there isn’t a fix. I’ll look into rclone as well.