Discussion section of Wiki plugin doesn't work with Headway theme

Hello, I recently installed the Wiki plugin and am using the Headway theme from http://headwaythemes.com/. When I go to the Discussions section of a wiki page it is just blank. http://wiki.tsl.org/wiki/test-wiki/?action=discussion

Do you know what I could do to fix this? I found this discussion but adding the suggested code to the loop didn't seem to work. https://premium.wpmudev.org/forums/topic/wordpress-wiki-discussion-does-not-work

Any other suggestions?

Thank for any help you can give.