Can't create backups LXC in "Snapshot mode"

[sand-max]

Virtual Environment 5.4-6

Hi guys! I have issue about backups of LXC.
I have LVM storage with LXC and when I make backup (for backups using NFS Storage) in "Snapshot mode" got some errors:



In "Stop mode " it works fine:

 

[sand-max]

Found workaround https://jan.philippi.name/2017/05/fixing-chown-issues-on-proxmox-with-ovh-soyoustart-backup-space/