Apple Music not playing some songs

Hi Apple,

I was listening to one of the songs that I had added to my playlist months ago, but now it shows me that that "song is not available in my country or region". I tried everything but nothing really worked out. It was working perfectly fine when I added the song to my playlist. It has been 3-4 months since when I added that song. I am not really sure why it happened to me. But I was listening to my music and when I tried playing that song, it showed that msg I mentioned above. It happening to me since last week.

Is there any setting to change that? or it's being graylisted by apple?