BSOD xen.sys

Hi,

i have migrated a Citrix XenServer VM with Starwinds V2V Converter to my vSphere 6.7 Farm.
The first time the VM starts fine.
After a restart i get a BSOD with xen.sys.
I tried to deinstall the XenTools and installed the VMware tools.
Same error.

Any idea how i can fix it?

Thanks and regards

Dennis