Comment # 2 on bug 1134426 from James Fehlig

(In reply to Konstantinos Tsamis from comment #0)
> Libvirt threw this error but I have no idea which string it means:

Why do you think the error comes from libvirt? The entire traceback comes from
virt-manager. What are your virt-manager and virt-install versions? Did the
problem occur after updating some packages?