Cannot Access imported playlists

[ghost]

Hello again

Apologies for logging multiple issues in a short space of time.
This relates to "Imported Playlists".
When I click on playlists in the music libraries, the playlists appear as expected (ie Favourites) however when I click on the playlist itself I receive the following message:

500: upnp: statusCode 500 & upnpErrorCode <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><s:Fault>s:ClientUPnPError701</s:Fault></s:Body></s:Envelope>

Is this a bug or are imported playlists not supported?

Thanks again for your work on this project.