Veeam to backup Openmediavault host

I try to backup with veeam my openmediavault host. It's installed barmetal. Downloaded and installed it with apt-get install veeam-nosnap. But if I try to backup my volume lvl, i get this error:

Item nvme0n1 cannot be backed up without veeam snapshot kernel modul.

Hiw I can get the modul?