When an SD card is inserted in the Zappiti Player 4K during updating or installing Spotify app, it may generate operational problems. For this reason, please check that no SD card is built into the Zappiti Player 4K before installing or updatin the app Spotify.

In case of operational issues, please re-install the firmware using the standard firmware update procedure described here:  
http://zappiti.com/FR/zappiti_player_firmwares.html#z4k