@mgformula
I used this driverpackage "NVIDIA-vGPU-CitrixHypervisor-8.2-550.54.16.x86_64.iso" and installed the vgpu source with "rpm -ihv vgpu-7.4.8-1.x86_64.rpm" this I have got from the Citrix installation iso.

The binary 7.4.13 should used for the Xcp-ng 8.3 release not for the 8.2.1.

The Problem from my earlier post is also solved, a new created vm was working. some copies from a another host does not work. perhaps there some driverconflicts in this Windows Vm.