Today when I get to work and begin completing my trails I notice that I'm unable to view the challenges. I scroll through the lesson, get to the end and there's the challenge +100 or + 500, with nothing else to view on complete. I've tried multiple trails and none of the challenges are working. I tried IE and Chrome, logging out/in, and restarting browsers and system. Anyone else having issues? Can someone lead me in the right direction?

Today when I get to work and begin completing my trails I notice that I'm unable to view the challenges. I scroll through the lesson, get to the end and there's the challenge +100 or + 500, with nothing else to view on complete. I've tried multiple trails and none of the challenges are working. I tried IE and Chrome, logging out/in, and restarting browsers and system. Anyone else having issues? Can someone lead me in the right direction?