I wanted to connect my Twitch account to Riot Games for this key drop, but when I click connect, the same message has been coming for days. When I try to connect Steam, Battlenet etc. I get the same message.
Just have problems right now. Try again tomorrow or maybe later
I've been trying to do this since the action started.
Problems can sometimes not be solved within 30-60min
But after a week it should work sometime or not.
Contact support