For me Google Drive always returns errors but it always finish. It takes a lot of time, but it is because of Google limitations. Have you tried to unlock
the repository to see if that works? You could try restic -r rclone:zombie: unlock
and then try again. Here are other posts related to Google Drive errors:
- Rclone Google Drive - Error 403: Permissions
- Errors 500 with rclone and google drive
- Error Backing Up
You could also search in this forum for “Google Drive” and see other results that may be helpful.