This is log from server:
2017-08-28 19:58:07: Testing if backup destination can handle subvolumes and snapshots…
Backupfolder not set
2017-08-28 19:58:07: Backup destination cannot handle subvolumes and snapshots. Snapshots disabled.
2017-08-28 19:58:07: Testing if backup destination can handle filesystem transactions…
Backupfolder not set
2017-08-28 19:58:07: Image mounting disabled: Backupfolder not set