Spotify playlist problem with Mopidy

Dear Sir,
I’m testing your “Mopidy” software with a lot of enthusiasm and interest. I installed “musicbox_webclient” and “modipy-spotify”; my operating system is Xubuntu 18.04.01 (VPS with wmware)
In “musicbox_webclient” I can perfectly search for songs in Spotify, but I can not see any playlists that are currently loaded in my “premium account” in Spotify. This is normal ?
I am grateful for your help and answer.