KeyError in upstart-bridge/service.py

Hello,
I am using XBian distribution, but when “logged in” to a profile, an upstart-bridge-related error appears in the kodi notification box (bottom right corner). Otherwise all seems to work …

This is (the only error) message in kodi.log:

Code:
ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<--
                                             - NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
                                            Error Type: <type 'exceptions.KeyError'>
                                            Error Contents: ('result',)
                                            Traceback (most recent call last):
                                              File "/usr/local/share/kodi/addons/script.service.xbian.upstart-bridge/service.py", line 205, in <module>
                                                service = UpstartBridge()
                                              File "/usr/local/share/kodi/addons/script.service.xbian.upstart-bridge/service.py", line 20, in __init__
                                                self.monitor = XBMCMonitor(self)
                                              File "/usr/local/share/kodi/addons/script.service.xbian.upstart-bridge/service.py", line 123, in __init__
                                                json_version = json_response['result']['version']
                                            KeyError: ('result',)
                                            -->End of Python script error report<--

Is this something for a bug report? What is the purpose of upstart-bridge service, btw?

Thank you very much.
Best regards,
R.