Backup failing after the host computer failed and repaired

I am having an error with back ups now. My backukp server is on ubuntu 18.4. Last week the server crashed because my timeshift back ups filled up the root drive. I fixed that and now all of my image and file backups fail. Here is what the log says:

2019-10-14 20:12:07(info): Starting scheduled incremental image backup of volume “D:”…
2019-10-14 20:12:07(info): Basing image backup on last full image backup
2019-10-14 22:38:55(error): Syncing file system failed. Image backup is not completely on disk. Invalid argument (code: 22)
2019-10-14 22:38:55(info): Transferred 3.80539 GB - Average speed: 3.7117 MBit/s
2019-10-14 22:38:55(info): Time taken for backing up client Office-win8: 2h 26m 47s
2019-10-14 22:38:55(error): Backup failed


You probably upgraded to 2.4.x? What kind of file system are you storing the backups to?

I am using a drobo with ntfs.