Unable to do full file backup Windows Server 2012 client

I’m unable to complete a full file backup in my Windows Server 2012 VM.
Image backup is working fine.
Same server is working fine with other VM’s doing full and image backups.
Checking the log (small version) it just says:

Log: (WINSERVER2012)

Nivel Hora Mensaje
Informativos 26/01/20 22:34 Starting unscheduled full file backup…
Informativos 26/01/20 22:35 Component caption= name=WINSERVER2012
Informativos 26/01/20 22:35 Component caption= name=WINSERVER2012
Informativos 26/01/20 22:35 Component caption= name=WINSERVER2012
Informativos 26/01/20 22:35 Component caption= name=WINSERVER2012
Informativos 26/01/20 22:35 Component caption= name=WINSERVER2012
Informativos 26/01/20 22:35 Indexing of “C” done. 18278 filesystem lookups 0 db lookups and 0 db updates
Informativos 26/01/20 22:35 WINSERVER2012: Loading file list…
Informativos 26/01/20 22:35 WINSERVER2012: Started loading files…
Informativos 26/01/20 23:15 Waiting for file transfers…
Errores 26/01/20 23:15 Removing snapshot on “WINSERVER2012” for path “C” failed: FAILED
Avisos 26/01/20 23:15 Writer WIDWriter has failure state VSS_WS_FAILED_AT_BACKUP_COMPLETE with error S_OK
Errores 26/01/20 23:15 Client WINSERVER2012 went offline.
Informativos 26/01/20 23:15 Waiting for file hashing and copying threads…
Informativos 26/01/20 23:15 Waiting for metadata download stream to finish
Informativos 26/01/20 23:15 Writing new file list…
Informativos 26/01/20 23:15 All metadata was present
Informativos 26/01/20 23:15 Transferred 36.1788 GB - Average speed: 130.38 MBit/s
Informativos 26/01/20 23:15 Time taken for backing up client WINSERVER2012: 40m 32s
Errores 26/01/20 23:15 Backup failed

If I do a “vssadmin list writers”, there aren’t any error on any writer.
If I do a “diskshadow > list shadows all” I get “No shadow copies found in system.”

What could be the problem?

Thanks in advance!

Update for my problem:
In the Windows Server 2012 VM was, installed the VMWare tools.
Uninstalled the VMWare Tools and now is working 100% fine.