Multisite Content Copier - Can't get past step 1 of wizard

I installed Multisite Content Copier today (v.1.0.3), and I can't seem to get past "step 1" of the wizard. I click the "next" button, and the page looks like it's loading step 2, but then it redirects back to step 1.

http://awesomescreenshot.com/04c21tfhd5