TimePitch

I recently updated to iOS 13 on my iPhone 8 Plus. Since then, my TimePitch app won't play music like it's supposed to. When I choose a song, it's supposed to add it to the lineup on the app and play automatically. TimePitch is an app that allows you to alter the pitch or speed of a song to get it to how you like it, as you may know. For some crazy reason, it doesn't seem to be functioning properly since I've updated my software. I tried re-installing it several times, but I haven't had much luck. I'd really appreciate it if someone could give me some advice on what to do to resolve this issue. Thank you very much.