Thread:Project:Support desk/Call to undefined method LanguageSl

After updating my wiki, I get the following error when accessing my wiki:

Fatal error: Call to undefined method LanguageSl::getHtmlCode in .../includes/SkinTemplate.php on line 280

I realize there's something probably wrong with a modification conflicting the update. Any idea how to fix it? 89.143.104.90 14:42, 17 July 2012 (UTC)