Problem with Client Backup

Today I can not create Backups:

26.09.21 05:19 INFO Waiting for file transfers…
26.09.21 05:19 INFO Referencing snapshot on 10.8.0.1 for path www failed: FAILED
26.09.21 05:19 DEBUG Loading file www (metadata only)
26.09.21 05:19 INFO Referencing snapshot on 10.8.0.1 for path home failed: FAILED
26.09.21 05:19 DEBUG Loading file home (metadata only)
26.09.21 05:19 INFO Referencing snapshot on 10.8.0.1 for path volumes failed: FAILED
26.09.21 05:19 DEBUG Loading file volumes (metadata only)
26.09.21 05:19 INFO Referencing snapshot on 10.8.0.1 for path opt failed: FAILED
26.09.21 05:19 DEBUG Loading file opt (metadata only)
26.09.21 05:19 INFO Referencing snapshot on 10.8.0.1 for path root failed: FAILED
26.09.21 05:19 DEBUG Loading file root (metadata only)
26.09.21 05:19 INFO Waiting for file hashing and copying threads…
26.09.21 05:20 DEBUG Saved metadata of 1 files and directories. 20% done…
26.09.21 05:20 INFO Writing new file list…
26.09.21 05:20 INFO All metadata was present
26.09.21 05:20 DEBUG Syncing file system…
26.09.21 05:20 INFO Transferred 3.54199 KB - Average speed: 12.192 KBit/s
26.09.21 05:20 DEBUG Script does not exist urbackup/post_full_filebackup
26.09.21 05:21 INFO Time taken for backing up client 10.8.0.1: 1m 10s
26.09.21 05:21 INFO Backup succeeded

I installed the backupclient again, deleted befor client installieng the client from the backend (force clean) but nothing happend.

What can I do?