I am logged in on the main page but when I try to start learning I get logged out. I have to request a login code by e-mail or register an e-mail account to my profile (because I was logged in on the original page using GitHub). Whichever I choose I am sent back to the main page and everything starts again…
I am having the same problem. I try to login and it keeps redirecting back to the learn main page with the pink header bar (Oops! Something went wrong. Please try again in a moment.). I have GitHub and Facebook and Google all up - I am logged in to all three. I even had FCC send me the email twice for the 6 digit passcode. Still…months later…I cannot login.