BUG REPORT: Error when saving option, making / deleting website in ajenti

I receive this error every time I delete, make or save settings of a site. I think the modification happen, but it returns this error every time:

org.freedesktop.DBus.Error.ServiceUnknown: The name :1.0 was not provided by any .service files

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/ajenti/plugins/main/main.py", line 158, in handle_message
    self.ui.dispatch_event(update['uid'], update['event'], update['params'])
  File "/usr/lib/pymodules/python2.7/ajenti/ui/__init__.py", line 72, in dispatch_event
    self.root.dispatch_event(uid, event, params)
  File "/usr/lib/pymodules/python2.7/ajenti/ui/element.py", line 382, in dispatch_event
    if child.dispatch_event(uid, event, params):
  File "/usr/lib/pymodules/python2.7/ajenti/ui/element.py", line 382, in dispatch_event
    if child.dispatch_event(uid, event, params):
  File "/usr/lib/pymodules/python2.7/ajenti/ui/element.py", line 388, in dispatch_event
    getattr(self, k)(**(params or {}))
  File "/var/lib/ajenti/plugins/vh/main.py", line 89, in on_recheck
    self.manager.run_checks()
  File "/var/lib/ajenti/plugins/vh/api.py", line 327, in run_checks
    self.__runall([(run_check, [c]) for c in self.checks])
  File "/var/lib/ajenti/plugins/vh/api.py", line 298, in __runall
    raise g.exception
DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name :1.0 was not provided by any .service files