Spotify not playing downloaded playlists

I just bought a fenix 7 solar update it with the pc app, download Spotify via connectIQ, connected my Bluetooth earphones, downloaded a playlist but when I try to play the downloaded playlist nothing happens: it is displayed a black screen with the play and back button with no song playing, even going to the next song doesn’t do a thing…

Restored the whole watch but nothing, repeated the procedure but nothing changed

I bought the fenix just because I needed the music functionality, can someone help?