I've got everything imaged, booted into Raspian and installed the PHATBeat package and Spotipy. In the Spotipy config screen, logged in to Spotify but is says that I "cannot start radio" each time I try to select something.
Did you install using our one-line-installer, or did you do all of the separate bits yourself? Have you installed any extra Mopidy plugins?
I installed the PhatBeat through the dashboard and then Spotipy through the terminal. I don't think that I installed any other plugins.