pyhoca-cli error with X2Go under Docker

[batmin@fedora-22 x2go-minimal]$ pyhoca-cli --server localhost -p 50000 -N --user user --add-to-known-hosts
pyhoca-cli[10468] NOTICE: preparing requested X2Go session
pyhoca-cli[10468] (PyHocaCLI) NOTICE: preparing requested X2Go session
pyhoca-cli[10468] (x2gosessregistry-pylib) NOTICE: registering X2Go session Pyhoca-Client_Session...
pyhoca-cli[10468] (x2goclient-pylib) NOTICE: initializing X2Go session...
pyhoca-cli[10468] (x2gocontrolsession-pylib) NOTICE: connecting to [localhost]:50000
pyhoca-cli[10468] (PyHocaCLI) WARN: passwordless login for ,,user'' failed
pyhoca-cli[10468] (PyHocaCLI) NOTICE: proceeding to interactive login for user ,,user''
Password:
pyhoca-cli[10468] (x2gocontrolsession-pylib) NOTICE: connecting to [localhost]:50000
pyhoca-cli[10468] (x2goterminalsession-pylib) ERROR: setting keyboard layout ,,us'' and variant ,,null'' for session user-50-1431980950_stRTERMINAL_dp24 failed: sh: setxkbmap: command not found
pyhoca-cli[10468] (PyHocaCLI) NOTICE: give the X2Go session some time to come up...
pyhoca-cli[10468] (PyHocaCLI) NOTICE: Press CTRL+C to suspend the running session...
pyhoca-cli[10468] (x2goclient-pylib) WARN: HOOK_on_control_session_death: the control session of profile Pyhoca-Client_Session has died unexpectedly
pyhoca-cli[10468] (x2gosession-pylib) WARN: local folder sharing is disabled for this session profile
pyhoca-cli[10468] (x2goproxy-pylib) WARN: X2Go proxy shutdown gave a message that we may ignore: [Errno 3] No such process
pyhoca-cli[10468] (x2gosession-pylib) WARN: local folder sharing is disabled for this session profile
pyhoca-cli[10468] (x2gosession-pylib) WARN: local folder sharing is disabled for this session profile
Traceback (most recent call last):
  File "/usr/bin/pyhoca-cli", line 423, in <module>
    thisPyHocaCLI.MainLoop()
  File "/usr/lib/python2.7/site-packages/pyhoca/cli/frontend.py", line 580, in MainLoop
    if self._X2GoClient__has_session_terminated(self.x2go_session_hash):
  File "/usr/lib/python2.7/site-packages/x2go/client.py", line 1847, in has_session_terminated
    return self.session_registry(session_uuid).has_terminated()
  File "/usr/lib/python2.7/site-packages/x2go/registry.py", line 116, in __call__
    raise x2go_exceptions.X2GoSessionRegistryException('No session found for UUID %s' % session_uuid)
x2go.x2go_exceptions.X2GoSessionRegistryException: No session found for UUID 88718b68-fd9c-11e4-83a8-001a4a1bd601
[batmin@fedora-22 x2go-minimal]$