New Volumio Spotify Plugin Open Beta-Testing

Hello to All

Host: Raspberry PI4
Volumio 3.301 Virtuoso membership
DAC: Hifiberry DAC+ RCA
Hw audio configured: HiFiBerry DAC Plus
Mixer type: Hardware
Number of channels: 2
Supported sample rate: 44100 48000 88200 96000 176400 192000

Spotify Premium - familiy contract
I installes the plugin as described in this thread

Problem:
No playback from spotiy tracks. It looks like playback of the selected song isn’t started al all.
No sound

I can browse through spotify and select a song.
When i start playing the song nothing happens/no sound!
I double checked Volumio:

  • Playing tracks from my qnap nas: no problem
  • Listing to webreadio: no problem
    rebooted the system several times: problem still exists
    switch off/switch on system: problem still exists

Starting a debug session in putty: volumio@volumio:~$ sudo journalctl -f

Jul 01 06:47:24 volumio volumio[888]: info: CoreStateMachine::startPlaybackTimer
Jul 01 06:47:24 volumio volumio[888]: info: CorePlayQueue::getTrack 8
Jul 01 06:47:24 volumio volumio[888]: info: [1656658044268] ControllerSpotify::clearAddPlayTrack
Jul 01 06:47:24 volumio volumio[888]: info: Setting this device active
Jul 01 06:47:24 volumio volumio[888]: info: Failed to Set Device Active: Error: Not Found
Jul 01 06:47:32 volumio volumio[888]: info: CoreCommandRouter::volumioGetState
Jul 01 06:47:32 volumio volumio[888]: info: CorePlayQueue::getTrack 8
Jul 01 06:47:32 volumio volumio[888]: info: Listing playlists
Jul 01 06:47:32 volumio volumio[888]: info: Listing playlists
Jul 01 06:47:42 volumio volumio[888]: info: CoreCommandRouter::volumioGetState
Jul 01 06:47:42 volumio volumio[888]: info: CorePlayQueue::getTrack 8

Look at the line : Failed to Set Device Active: Error: Not Found

Is this an error?
Am I doing something wrong?