Apple Music wont download my purchased music

So I have thousands of purchased songs dating back to the early 2000s, and now that iTunes no longer handles music, Apple Music will not allow me to download my purchased music to my computer for content backup. When I try, I have to select every album individually and select download, and then half of the songs error out with code 7608, and then Apple Music crashes. I have sunk lots of money into iTunes purchases and can't use them outside Apple Music. Can I download all my purchases simultaneously to my computer? Is there a way?