Unable to get a running HAOS installation on proxmox

Hi,
after a year or more of doing nothing I decided to upgrade Homeassistant again. So far I was using an installation in a LXC container but unfortunately that seems to not be the recommended installation anymore. So I planned to go with an installation in a VM on my Proxmox hypervisor. But unfortunately I am not able to create a VM which is also able to boot.

What I do: create a VM with UEFI and 2G of RAM. I ditch the attached HDD and import the haos qcow (tried it with HAOS 7.0 and 6.x). I also turn off secure boot in the UEFI of the VM.

The first unit which fails is systemd-time-wait-sync ( Failed to add a watch for /run/systemd/timesync: No such file or directory)

Later a whole bunch of other stuff fails (e.g. Failed to mount HA OS data partition) and it drops me into the emergency console after trying to start docker. The emergency console unfortunately does not offer much debugging

Anybody an idea whats going on there?

In case someone is interested: My problem was caused by an oudated proxmox kernel, which prevented any VM to perform write operations on their respective disk. For some reason my Proxmox installation did not update the Grub config to load a more recent kernel since ages.