Playlist Play button does not start playback, play cue stays empty

Volumio Version: 1.099
Hardware: minidsp SHD studio

I’m a new user to Volumio, trying to make the most from the playlist capabilities.

I created a playlist by adding songs from the play cue. The songs are from my Tidal subscription.

What I click on the Play button next to the playlist nothing happens. The play cue stays empty.

This is a big bummer. I counted on this feature, to mix songs from Tidal with my music files and now it does not work properly.

Please help.