Virsh (libvirt-bin) is not able to communicate with Xen server

I have installed the latest version of Xen server 6.5. Now I want to coect to it with virsh (libvirt-bin). When I do this I get the error

error:end of file while reading data: sh:nc:command not found: In-/out error

I find something on the inteet that this could be because of an misconfigured user on the Xen server. Since today was my first time installing Xen ever, I am not comfortable with going into an shell and change some things and brake it. Maybe somebody could help me on where to start with looking at logs or maybe even the solution to the problem?

Question: What exactly does this error mean and how can I solve it?