Libxenlight failed to create new domain 'sys-net'

[apparatus]

Libxenlight failed, unable to add vif devices

This is most likely an issue with netvm to which your sys-vpn is connected - I guess it’s sys-firewall. Is it running, or maybe crashed? Can you check logs there? Is xendriverdomain service running (you can check with systemctl status xendriverdomain command in there)?