Wiki Plugin Misbehaving

Yesterday something strange happened. I went to add a new wiki and noticed that I couldn't choose a Parent Wiki. The dropdown box was no longer there. After that I noticed that my wiki categories/tags are gone from view as well.
Here is a screenshot:

Notice that the autocomplete for the tags is working but if I go to the "Wiki Tags" section it indicates 6 pages of tags but none are shown.
See this screenshot:

You can see that all the "Popular Tags" are there but not shown to the right. Although, if I organize by Wiki they do appear.

I'm very confused about how this could happen. Any help would be greatly appreciated.