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?

Before you can expect any helpful informaion or advice, you need to provide more information; things like what server version and client version are you using? What OS is the server installed on? What OS is the client installed on? What kind of backup are you trying to do?