Redirect loop on Adobe Forums

It didn't, unfortunately.  Private windows in Firefox/Edge/Chrome did not work around the issue and had the same behavior.  Clearing cookies had the same behavior.  The only thing that ended up solving it was changing my user's screen name to something else.  Changing it back to the previous screen name (which I'd used for some time on Adobe forums) again put it into a redirect loop. 

It's a bug, but at least it does have a workaround:  Change your screen name. 

I feel like you may have misunderstood the issue. When I signed up for the forums and tried to go to the website you posted, the browser timed out after it encountered a redirect loop. I tried to get to the page on my phone and the same thing happened as soon as I signed in.

The workaround for me to get onto the forums, which clearly I have already done, was to go to www.adobe.com, sign in, then change my screen name. After that, I could get onto https://forums.adobe.com/welcome. I don't know what changing my screen name has to do with causing redirect loops, but I found that workaround on a different forum. Other people have posted about this elsewhere (because at the time they could not get onto this forum) at least here, here, here, here, and here.