The reasons why Apple Music might not be playing include poor or unstable internet connection, Apple Music service errors or server downtime, glitches or bugs in the Apple Music app, issues with your Apple Music subscription (like expiration or payment problems), outdated software or app version, corrupted cache or app data, syncing issues with your Apple Music library, regional restrictions on content, and device storage limitations. To fix this, common solutions include checking if Apple Music servers are down via Apple's System Status page, ensuring a strong and stable internet connection (switching networks, restarting the router, toggling Airplane Mode), restarting the Apple Music app, checking your Apple Music subscription status, updating your operating system and Apple Music app, clearing the app cache or reinstalling the app, signing out and back into your Apple ID, and checking for any parental controls or content restrictions on your device. If these steps do not work, contacting Apple Support might be necessary for further assistance.