Linn apps don't play music from Plex Media Server

Hi, anyone out there who is using Plex Media Server (on Synology NAS) successfully with one of the Linn apps Kazoo or Linn?
I can see the album arts and select songs, but when trying to play a song my Linn shows an hourglass, and in my Linn apps the progess timer of the song stays at 0.00.
On my Synology NAS I’m running PMS version 1.18.5.2305.
When I select MinimServer (also running on my Synology NAS), the Linn apps play the songs OK, so it looks like a miscommunication between PMS and the Linn apps.

A post was merged into an existing topic: Plex server and Linn apps