Urbackup failed snapshots with "no snapshot mechanism"

Hello everyone, I’m using urbackup to back up internet clients. During installation, I chose no snapshot mechanism, but a 120GB backup takes too much time, when looking at the logs, you can see that it loses a lot of time when trying to make a snapshot, although there is a mode without snapshots, I don’t have a snapshot.cfg file in /usr/local/var/urbackup . Tell me what could be the problem?