Hi Marwan1100,
We understand you're unable to listen to music through the Apple Music service. We're happy to offer some guidance.
If you're getting an error about the Apple Music server when trying to listen to content, that'll typically come from a connection issue.
You can try restarting your device: Restart your iPhone
If you're using a Wi-Fi connection, you can also try turning that off to use the cellular connection. See if you get the same error in Apple Music over both connections or just one. If you only get the error message over Wi-Fi and not cellular, or vice versa, then you'll know the issue is coming from that particular internet connection.
It's also a good idea to make sure your device is up to date.
Update your iPhone, iPad, or iPod touch
If you're still getting a server error when trying to play content from the Apple Music service, we'd recommend contacting Apple for assistance: Get Support
Hope this helps. Cheers!