am i missing something? the only way to enable iTunes Match is going to the store and clicking on the iTunes Match button right? but when i do that it does nothing after i logged in. it just sits there on the following screen:
Just had the exact same issue. I had to "sign out" of my account in iTunes, quit iTunes, start it back up, sign in, go to iTunes Store, click on iTunes Match, then tried "add this computer" again and it took this time.
The whole "matching your collection" screen doesn't show in 12.2 iTunes, it just has a loading circle which pops up in the upper right of the iTunes window. Once that stops spinning you should have iTunes Match enabled once again.
This bug does suck because if it doesn't recognize you trying to enable iTunes Match you can't view the iTunes store.