Every time a backup tries to delete an old backup from Google Drive it produces an error such as:
23/10/2017 13:30 Failed to clean up backups of “Killing Game Backup” job: [DST-5:1107#1] Failed to delete file “KillingGame201707061730log.zip” > Unexpected response status code “Completed”. Status description: “Forbidden”. ErrorMessage: “”. ErrorException: “”.