Error: HA Shut Down my Proxmox VM

[hellboy-wien]

Hello
Someone has experienced that HA just turn off?

HA Crash while Backup and turn PROXMOX Machine OFF

Hallo! I installed Samba backup and set it to do a full backup at 3am. The next day I noticed that my HA crashed. My HA runs on a VM in PROXMOX (with autoboot). The VM was suddenly powered off. I then started the VM manually and everything worked again. (no backup) Then I started a backup manually and the system was switched off again? What can that be (HDD full?!) Do you have any ideas? Thanks in advance