Spotify can't play this right now.

[BakedPotato_1]

I'm on Windows 10 using the Spotify website on Firefox.

Whenever I try to play a song, it says "Spotify can't play this right now." and then tries playing the next song. But it says that for most songs, so it will quickly cycle through 5-10 songs before landing on one that it can actually play.
I've tried following every tip online to solve this problem. How do I solve this?