I stuck on step 2, too. Follow "Activity: Enable GitHub Pages" steps, and I can visit the github page.10 hours passed, I still stuck on step 2. I think this is a bug.
@ishowman it looks like you were able to move to the next step! Please let us know if you have any other difficulties.
@crichID I am also having this problem on "Introduction to GitHub" could you move me to the next step?