2.4.9 update broke my server

I have urbackup installed on ubuntu 18.4. Everything was working well and then I think my system updated to 2.4.9. Now all backups fail. My destination is a drobo s that is formatted with NTFS. I am new with urbackup so not sure what to do next.

Here are server log:

Info 10/17/19 19:13 Starting scheduled incremental file backup…
Info 10/17/19 19:14 Selected no components to backup
Info 10/17/19 19:14 Scanning for changed hard links on volume of “C:”…
Info 10/17/19 19:14 Following symbolic link at “C:\Users\rksha\Documents\My Pictures” to “C:\Users\rksha\Pictures” confirms symlink backup target “.symlink_Pictures” to “C:\Users\rksha\Pictures”
Info 10/17/19 19:14 Following symbolic link at “C:\Users\rksha\Documents\My Videos” to “C:\Users\rksha\Videos” confirms symlink backup target “.symlink_Videos” to “C:\Users\rksha\Videos”
Info 10/17/19 19:14 Indexing of “Documents” done. 1 filesystem lookups 88 db lookups and 0 db updates
Info 10/17/19 19:14 Indexing of “Downloads” done. 1 filesystem lookups 155 db lookups and 0 db updates
Info 10/17/19 19:14 Indexing of “Music” done. 1 filesystem lookups 16 db lookups and 0 db updates
Info 10/17/19 19:14 Indexing of “Pictures” done. 1 filesystem lookups 61 db lookups and 0 db updates
Info 10/17/19 19:14 Indexing of “Desktop” done. 1 filesystem lookups 37 db lookups and 0 db updates
Info 10/17/19 19:14 Indexing of “Quicken Files” done. 1 filesystem lookups 7 db lookups and 0 db updates
Info 10/17/19 19:14 Scanning for changed hard links on volume of “L:”…
Info 10/17/19 19:14 Indexing of “L” done. 2 filesystem lookups 1306 db lookups and 2 db updates
Info 10/17/19 19:14 Office-win8: Loading file list…
Info 10/17/19 19:14 Office-win8: Calculating file tree differences…
Info 10/17/19 19:14 Office-win8: Calculating tree difference size…
Info 10/17/19 19:14 Office-win8: Linking unchanged and loading new files…
Info 10/17/19 19:15 Waiting for file transfers…
Info 10/17/19 19:34 Waiting for file hashing and copying threads…
Info 10/17/19 19:41 Writing new file list…
Info 10/17/19 19:41 All metadata was present
Errors 10/17/19 19:41 Syncing file system failed. Backup is not completely on disk. Invalid argument (code: 22)
Info 10/17/19 19:41 Transferred 22.7446 GB - Average speed: 164.314 MBit/s
Info 10/17/19 19:41 Time taken for backing up client Office-win8: 27m 40s
Errors 10/17/19 19:41 Backup failed

He is client log:
Starting scheduled incremental file backup…
Selected no components to backup
Scanning for changed hard links on volume of “C:”…
Following symbolic link at “C:\Users\rksha\Documents\My Pictures” to “C:\Users\rksha\Pictures” confirms symlink backup target “.symlink_Pictures” to “C:\Users\rksha\Pictures”
Following symbolic link at “C:\Users\rksha\Documents\My Videos” to “C:\Users\rksha\Videos” confirms symlink backup target “.symlink_Videos” to “C:\Users\rksha\Videos”
Indexing of “Documents” done. 1 filesystem lookups 88 db lookups and 0 db updates
Indexing of “Downloads” done. 1 filesystem lookups 155 db lookups and 0 db updates
Indexing of “Music” done. 1 filesystem lookups 16 db lookups and 0 db updates
Indexing of “Pictures” done. 1 filesystem lookups 61 db lookups and 0 db updates
Indexing of “Desktop” done. 1 filesystem lookups 37 db lookups and 0 db updates
Indexing of “Quicken Files” done. 1 filesystem lookups 7 db lookups and 0 db updates
Scanning for changed hard links on volume of “L:”…
Indexing of “L” done. 2 filesystem lookups 1306 db lookups and 2 db updates
Office-win8: Loading file list…
Office-win8: Calculating file tree differences…
Office-win8: Calculating tree difference size…
Office-win8: Linking unchanged and loading new files…
Waiting for file transfers…
Waiting for file hashing and copying threads…
Writing new file list…
All metadata was present
Syncing file system failed. Backup is not completely on disk. Invalid argument (code: 22)
Transferred 22.7446 GB - Average speed: 164.314 MBit/s
Time taken for backing up client Office-win8: 27m 40s
Backup failed

rkshack

I had a backup of the server using timeshift to the day of my last successful backup. Now everything is working fine. I still am at 2.4.9 so that must not have been the cause. Hopefully it keeps working.
rkshack