Where did Brian Eno's Albums Go?

Brian Eno is one of my favorite artists and I had a song of his in a playlist I was creating. I went to listen and got a ‘MS2002’ error. I ensured my cache was empty, but, this didn’t remedy the issue. I went to Brian Eno’s artist page within Deezer and most of his albums from the 1970’s aren’t even there. Is this accurate? Are earlier albums from Brian Eno (everything before 1977 it appears) not available now?