empty cpuset.cpus

Dear all,
I tried to fire up your program on a Debian 12 using kernel 6.1.0-6-amd64.

I have one running VM, and my
/sys/fs/cgroup//machine.slice/machine-qemu\\x2d1\\x2dsanyi.scope/libvirt/emulator/cpuset.cpus

contains only a "\n".

the app raises an exception at vmtop.py:63

The error msg is:
Unexpected error on VM creation: (, ValueError("invalid literal for int() with base 10: '\\n'")

Regards,

Mitya