Needs music fixed

I dont know what happened to it, because it used to work just fine, but you cannot select a song to record with anymore. I look up a song I want to use and the only option is "Buy song" which I cant because I have it on Apple Music. I deleted the app months ago because of this problem and I redownloaded it today to see if they fixed it, which they obviously havent. Fix this problem!!!

MacSweaty about Acapella from PicPlayPost