Thank you for sharing your concern. And please follow the easy troubleshooting steps which might help to solve the issue.
1 Swipe left or right until you are on the Playlists section
2 Tap + icon
3 Give your playlist a name and tap Create to make your playlist
4 Tap the tracks that you want to add to your playlist and tap Done to save your playlist.
5 Your playlist will now appear in the Playlists section of the app
6 Tap the + icon
7 Tap the playlist that you want to add the track to
In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report).
