[Android][Playlists] Some songs from my playlist do not appear

[soniaherrcres]

Hello, my problem is this. There are some songs from my Spotify not playing in 30 second preview on my Spotify free. It happens to me in most of my playlists and I don't understand the problem. I have installed and uninstalled the app and it keeps telling me the same thing. (If there is something wrong, forgive me because I did it with the translator)