Error installing on Kodi 15.1 - ImportError: No module named CallListenerClients.FritzboxClient

[bhamail]

I installed the plugin from .zip file: service.script.call-notifications-0.5.3.zip

After install, an error popup shows, and the following is in the log:

00:13:10 2247.498535 T:1968062464   DEBUG: CGUIMediaWindow::GetDirectory ()
00:13:10 2247.498779 T:1968062464   DEBUG:   ParentPath = []
00:13:10 2247.526611 T:1629713472  NOTICE: -->Python Interpreter Initialized<--
00:13:10 2247.527100 T:1629713472   DEBUG: CPythonInvoker(10, /storage/.kodi/addons/service.script.call-notifications-0.5.3/service.py): the source file to load is "/storage/.kodi/addons/service.script.call-notifications-0.5.3/service.py"
00:13:10 2247.608643 T:1629713472   DEBUG: CPythonInvoker(10, /storage/.kodi/addons/service.script.call-notifications-0.5.3/service.py): setting the Python path to /storage/.kodi/addons/service.script.call-notifications-0.5.3:/storage/.kodi/addons/script.module.t0mm0.common/lib:/storage/.kodi/addons/script.module.twisted/lib:/storage/.kodi/addons/script.module.zope.interface/lib:/usr/lib/python27.zip:/usr/lib/python2.7:/usr/lib/python2.7/plat-linux2:/usr/lib/python2.7/lib-tk:/usr/lib/python2.7/lib-old:/usr/lib/python2.7/lib-dynload:/usr/lib/python2.7/site-packages:/usr/lib/python2.7/site-packages/gtk-2.0
00:13:10 2247.608887 T:1629713472   DEBUG: CPythonInvoker(10, /storage/.kodi/addons/service.script.call-notifications-0.5.3/service.py): entering source directory /storage/.kodi/addons/service.script.call-notifications-0.5.3
00:13:10 2247.609375 T:1629713472   DEBUG: CPythonInvoker(10, /storage/.kodi/addons/service.script.call-notifications-0.5.3/service.py): instantiating addon using automatically obtained id of "service.script.call-notifications" dependent on version 2.1.0 of the xbmc.python api
00:13:10 2247.621094 T:1540355136  NOTICE: Thread BackgroundLoader start, auto delete: false
00:13:10 2247.628662 T:1540355136   DEBUG: Thread BackgroundLoader 1540355136 terminating
00:13:11 2248.307617 T:1629713472   ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<--
                                             - NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
                                            Error Type: <type 'exceptions.ImportError'>
                                            Error Contents: No module named CallListenerClients.FritzboxClient
                                            Traceback (most recent call last):
                                              File "/storage/.kodi/addons/service.script.call-notifications-0.5.3/service.py", line 8, in <module>
                                                from CallListenerClients.FritzboxClient import FritzboxClient
                                            ImportError: No module named CallListenerClients.FritzboxClient
                                            -->End of Python script error report<--
00:13:11 2248.327881 T:1629713472    INFO: Python script stopped
00:13:11 2248.328125 T:1629713472   DEBUG: Thread LanguageInvoker 1629713472 terminating
00:13:21 2257.690918 T:1968062464   DEBUG: ------ Window Deinit (DialogKaiToast.xml) ------
00:13:40 2277.486816 T:1707078720   DEBUG: Thread JobWorker 1707078720 terminating (autodelete)
00:13:40 2277.556152 T:1968062464   DEBUG: SECTION:UnloadDelayed(DLL: special://xbmcbin/system/ImageLib-arm.so)

I'm happy to try stuff out if it will help. (I'm a python noob, but will try out any suggestions). Thanks.

BTW, I'm trying to connect this to an NCID server running on a different RaspberryPi.