I'm having trouble logging into my developer edition when trying to complete Trailhead challenges. Though I'm logged in to Trailhead as a whole, when I click the "Connect to your Developer Edition, it takes me back and forth between the same two screens, over and over again (see attachment). Has anyone else had this problem? What's the solution to get past it? I've done it before, as I have completed trails, points, etc. so I would hate to have to start again.