Got my invite to test cloud gaming on Xbox.com but redirects to missing page

Along with Vaynel's error message, the green banner with the links and account info with gamerpic is missing. If inactive for a random period of time, the site redirects me to the Xbox.com home page. Why?

I'm seeing the same issue on Linux (Steam Deck) and Android (Samsung A72), although the Game Pass app works fine on the latter (because it has a cached login, presumably; I just tested with it to see if the issue was just on my Steam Deck).

It's not just cloud gaming, either - *any* login on Xbox.com (the front page, the store, whatever) results in being redirected to the same error page.

Edit: Microsoft.com logins work fine (clearly, as I'm posting here), and even support.xbox.com works OK, but anything on www.xbox.com is broken.

It doesn't work for me because the site redirects me to the usual marketplace page on Xbox.com

microsoft store has high price. xbox one redirects to xbox.com or buying from 360. I don't have a 360, so I went with the xbox.com option, and followed the black ops franchise sale link which redirected to the xbox one, and then was promptly not part of
the xbox.com page at all on a second attempt.

I have this problem too I enter my password and it says it's always wrong and on xbox.com it redirects me too the same page over and over HELP!!!!!