Hi, and welcome to the community!
What OS, device, and Spotify version are you running?
Please note that from memory if you haven't got premium on a mobile device you can only play songs on shuffle. A premium sibscription is required to play specific songs on demand.
If you have, Have you tried a quick Clean reinstallation of Spotify?
Hey there you,
Yeah, you! 😁
Welcome - we're glad you joined the Spotify Community!
While you here, let's have a fun game…