He isn’t answering my calls or anything. I’m very curious. What do you think could of happened?

A long distance friend I did music with had songs all over Spotify, iTunes, and YouTube. Then poof, literally everything was gone including him. Social media, everything! He was on a label if that means anything. But what do you think happened?
He isn’t answering my calls or anything. I’m very curious. What do you think could of happened?
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