Thread:Project:Support desk/Mediawiki upgrade 23 to 25

Hi

I upgraded my wiki from 23 to 25 and after the upgrade everything is wokring fine except i cant acess the "special pages" anymore. I get this error

Warning: require(/home/public_html/includes/specials/SpecialAllPages.php): failed to open stream: No such file or directory in /home/student/public_html/includes/AutoLoader.php on line 90

Fatal error: require: Failed opening required '/home/public_html/includes/specials/SpecialAllPages.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/student/public_html/includes/AutoLoader.php on line 90

Anyone know why i get this error ?