How to cancel Resumed full file backup? And start incremental

I did it. Now it starts incremental file backup with error:

Info 09.09.21 22:04 battenfeld-nassrv: Calculating file tree differences…
Errors 09.09.21 22:04 Error while calculating tree diff. Not doing full backup because of internet connection.
Errors 09.09.21 22:05 Backup had an early error. Deleting partial backup.

How to fix it?

Full log at the client attached.
urbackupclient.zip (660.1 KB)