Interesting, with Firefox, without incognito mode, the page is found but with Chromium in incognito mode, I also have a Page Not Found error. It looks like they

Interesting, with Firefox, without incognito mode, the page is found but with Chromium in incognito mode, I also have a Page Not Found error. It looks like they are doing some kind of browser sniffing or requesting to be signed in without sending back the right error code if not signed in.