As the ongoing thread about this is now locked I needed to start new one. Contrary to the last comment on original thread, it’s not fixed. "You need a level 10 character to post on the forums " if I use the Microsoft Edge browser.
No longer a problem for me as Google browser works fine, just saying.
This may be better situated in Tech Support? Don’t think anyone here is involved with how the forums work on browsers, and I’m not entirely sure that information can/will be passed on to those who do.
Until it starts working again, is it a huge problem to stick with Chrome for however long it takes? It shouldn’t be too much of a hassle to transfer bookmarks, favorites, etc.
Realized my OP sounded more like grumbling than trying to be helpful. And I hate people who do that 
Is really no problem anymore, was intended to be an FYI.
Probably better here:
Tech support is for the game client and launcher, crashes and lags, and only player to player now adays.
You have cleared the cache and cookies in edge?
You appear to have found an Edge case…
(i’ll see myself out)
It is almost certainly a cookies or cache issue. Clear them out in edge using delete browsing history going back far enough or back forever and it should work. It’s possible to clear them for just the blizzard sites but it’s more involved.