I'm on a desktop PC. I've tried the links that are "invites", I put in a username, it asks me to confirm that I'm not a bot, then it gives the "something out of the ordinary" page and asks for a verification. Now, it seems that whether its successful or not, Discord saves the usernames I've attempted to use in the past, and most importantly, the cellphone number to use for it to send security code. Made my first attempt back in October, but for some reason it didn't take. My attempts more recently have failed ultimately because Discord recognizes that my number has been used before, so it won't let it be used to even attempt to certify another account.
The only method that I haven't explored is using something other than my browser to view Discord in (there is an option for a separate install), but I may still encounter the same stumbling blocks when trying to create an account.
Regardless, this is a moot point with respects to my Knossos problems, as I decided to back-up all of my work and go with the reinstall thing. Fortunately, it auto-detected my current install and the only thing I lost was my command line settings and a few other preferences, easily fixed.