Conflict with Table of Contents Plus plugin?

Hello, There's a nice plugin for displaying a table of contents on pages/posts, the TOC+ plugin. Whenever I activate it and then try to customize the theme, I get a blank screen: https://www.dropbox.com/s/8hv6xbxvcne2sqa/catch_toc_plus.png?dl=0 Is it possible that there is a conflict between catch base and TOC+?