[LuzZz]

In addition: This is what my KODI log says:

18:11:36.554 T:1720132528 WARNING: plugin.audio.spotify --> Exception in utils ! --> [Errno 1] Operation not permitted: '/home/pi/.kodi/addons/plugin.audio.spotify/resources/lib/spotty/arm-linux/spotty-muslhf'
18:11:36.650 T:1720132528 WARNING: plugin.audio.spotify --> Exception in utils ! --> [Errno 1] Operation not permitted: '/home/pi/.kodi/addons/plugin.audio.spotify/resources/lib/spotty/arm-linux/spotty-hf'
18:11:36.661 T:1720132528 WARNING: plugin.audio.spotify --> Exception in utils ! --> [Errno 1] Operation not permitted: '/home/pi/.kodi/addons/plugin.audio.spotify/resources/lib/spotty/x86-linux/spotty'
18:13:29.289 T:1946059424 ERROR: CPythonInvoker(3, /home/pi/.kodi/addons/plugin.audio.spotify/service.py): script didn't stop in 5 seconds - let's kill it

Hmmm, ignore my previous message. You are in fact running the beta version but on an unsupported OS as it seems.
Please test with Libreelec which should work fine.

Hello!

Thank You for Your fast reply!
I am running a Raspbian Jessie with Kodi 17.3
Like You said - already on Your REPo :-)
I thought it may be permission related issue but I changed them to 777 - without success

Best regards,
Lucas