I have exactly the same problem after Proxmox update to 7.1-5 with Windows 10 VMs, no backup works, no console, I can't even shut down the VMs cleanly. Only the Linux containers and the Linux VMs work normally
-- Journal begins at Fri 2021-10-15 17:58:48 CEST. --
Nov 20 10:33:16 pve1...