Unexpected non-MediaWiki exception encountered, of type "Error"
Error: Call to undefined method SpecialPage::SpecialPage() in /home/princeorg/www/mediawiki/includes/SpecialPage.php:823
Stack trace:
#0 /home/princeorg/www/mediawiki/includes/GlobalFunctions.php(2374): UnlistedSpecialPage->__construct('Specialpages')
#1 /home/princeorg/www/mediawiki/includes/SpecialPage.php(368): wfCreateObject('UnlistedSpecial...', Array)
#2 /home/princeorg/www/mediawiki/includes/SpecialPage.php(383): SpecialPage::getPage('Specialpages')
#3 /home/princeorg/www/mediawiki/includes/SpecialPage.php(482): SpecialPage::getPageByAlias('SpecialPages')
#4 /home/princeorg/www/mediawiki/includes/Wiki.php(224): SpecialPage::executePath(Object(Title))
#5 /home/princeorg/www/mediawiki/includes/Wiki.php(55): MediaWiki->initializeSpecialCases(Object(Title), Object(StubObject), Object(WebRequest))
#6 /home/princeorg/www/mediawiki/index.php(93): MediaWiki->initialize(Object(Title), NULL, Object(StubObject), Object(StubUser), Object(WebRequest))
#7 {main}