New Volumio Spotify Plugin Open Beta-Testing

Hi volumio,
Thanks for the work so far, appreciate it.
System: raspberry PI 4, 8GB, Hifiberry DAC Plus.
Volumio 3.301, Spotify plugin 3.0.3

As I could not reach previous spotify 3.0.2, I re-installed the Spotify plugin 3.0.3. When selecting a song, an error appears Spotify API error. At some point I was able to play a song, but later on no control anymore. Restarted raspberry, no change. Reinstalled the plugin, no change. See the log:
http://logs.volumio.org/volumio/ouHzs0O.html