Had the same issue.
Until the developer changes it you can do it yourself and make it compatible.
In the omega beta 1 they changed the kodi database versions for the music and movie database.
So you need to download the pkc zip of the pkc add on itself (not the one of the repository), unpack it and then change these 2 lines in the variables.py script which are used to define the supported kodi database versions:
SUPPORTED_VIDEO_DB = {
19: (119, ),
20: (119, 120, 121),
21: (121, ),
}
SUPPORTED_MUSIC_DB = {
19: (82, ),
20: (82, ),
21: (82, ),
}
To the following values:
SUPPORTED_VIDEO_DB = {
19: (119, ),
20: (119, 120, 121),
21: (121, 122),
}
SUPPORTED_MUSIC_DB = {
19: (82, ),
20: (82, ),
21: (82, 83),
}
Then save it,  zip the folders again correctly so the zip can be installed in kodi again.
Kodi should install / update it now and the pkc add on works again.
If you get any errors regarding sources.xml you can try to delete this file via. kodi file manager in your kodi profile folder. Then restart kodi and the error should no more pop up.
Hope I could help.
