TvServer tunes the channel, but Kodi does not play it

I am currently running MP 1.16, where the TVServer is installed on a W10 PC.

I have installed:
– the latest MP PVR plugin on the TVServer
– allowed the plugin to create the shares for recordings and TSBuffer
– installed Kodie 17 (on another W10 PC – TvServer and Kodie are not on the same PC’s)
– installed the PVR MP plugin in Kodie

What works:
– I get TVChannels and Guide data inside Kodi

What does not work:
When I try to tune a channel then the spinning blue “busy” icon appears and then goes away.
Inside of the TvServers manual control section I see that the Kodi plugin tuned the channel, but there is no playback on the client.

I also tried the RTSP streaming option but then the spinning blue “busy” icon will never go away and I have to close Kodi with ALT+F4