Hello mudira,
To help us get a better understanding of the issue, we’d like to ask a few questions.
1. Is this happening with all content you try to play, or only certain content?
2. Were any changes made to your account before this occurred? If so, what changes were made?
3. Do you use Apple Music on multiple devices? If so, does the issue occur on all devices?
The above details will help us plan how to proceed.
If the affected songs appear as being grayed out, the "If a song is grayed out" part of this link has some information on why that may occur: If songs are missing from your music library after you turn on Sync Library
If a song is grayed out
If you see No Longer Available next to a song that's grayed out, the song was added from Apple Music and was removed from the Apple Music catalog.
Learn what the different cloud icons and symbols next to your songs mean in the Apple Music app
Learn what the different cloud icons and symbols next to your songs mean in iTunes
Thanks!