Thread:Project:Support desk/Fatal Error with SpecialListfiles.php

Hi, I alway get the following error when I want to go to the list of files. Fatal error: Call to a member function toHtml on a non-object in /Applications/MAMP/htdocs/wiki/includes/specials/SpecialListfiles.php on line 196

Where can I start, what can I do? My MW 1.21 is running fine instead of this error.