error while getting avatar: UnknownMethod: Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/dbus/service.py", line 654, in _message_cb (candidate_method, parent_method) = _method_lookup(self, method_name, interface_name) File "/usr/lib/python2.7/site-packages/dbus/service.py", line 246, in _method_lookup raise UnknownMethodException('%s is not a valid method of interface %s' % (method_name, dbus_interface)) UnknownMethodException: org.freedesktop.DBus.Error.UnknownMethod: Unknown method: avatarGet is not a valid method of interface org.goffi.sat_main.plugin