Some songs won't play

[Malinsteph]

I installed spotify on my iPhone 6, and after deleting almost all my apps and pictures to have enough space to Get my playlists offline, And finally all my songs synced. But som songes just won't play, doesn't matter if im connected to wi-fi or use my 4G, or find The song in the album and try to play it there, it just stops. Also i'm not seeing any album covers when i play songs.

[Peter__]

Weird, does this happen on all tracks or is there something special about the ones it happens on (like them being local files that have been synced to your device)?

[Malinsteph]

Yes actually! I checked, and none of my local files will play, even though some off them have The Green arrow, as if they were synced. How can I fix this?