I'm experiencing similar issues on 2 out of 8 of my window server 2022 VMs. All 8 VMs with very similar configurations and no vTPM or secure boot on them. The only thing I see in common between the two that fail and the others is all the servers were set with static RAM 8Gb and Dynamic Max 8Gb. Except these two they were set 16 static and 8 dynamic. When I changed them to 8static and 8dynamic it ran just fine.

This isn't a deal breaker for me, but figured it might give you some insight or direction to look.

Xen Orchestra self compile commit ef3ad