Greetings,
Thanks for visiting the Apple Support Communities! It seems you're unable to play music with your Apple Music subscription on your iOS device.
Restart your device, and ensure your device is updated:
Additionally, check the System Status page to see if there's any issues affecting Apple Music: System Status - Apple
If the issue persists, sign out of the iTunes & App Store on your device, sign back in and then test the behavior. Keep in mind, taking this step will remove music downloaded for offline listening. Tap Settings > [your name] > Media & Purchases > Sign Out.
Kind regards.