Unable to complete install: 'internal error: libxenlight failed to create new domain 'freenas''

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 88, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/create.py", line 2288, in _do_async_install
    guest.start_install(meter=meter)
  File "/usr/share/virt-manager/virtinst/guest.py", line 461, in start_install
    doboot, transient)
  File "/usr/share/virt-manager/virtinst/guest.py", line 396, in _create_guest
    self.domain = self.conn.createXML(install_xml or final_xml, 0)
  File "/usr/lib/python2.7/site-packages/libvirt.py", line 3782, in createXML
    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirtError: internal error: libxenlight failed to create new domain 'freenas'