JanLuca/UMEduWiki — pull request #1 by Zidjinn (2014-06-13 15:57:17+00:00)
Title: SpecialPage::SpecialPage

It's not possible to call Specialpage anymore because of this error. I found a solution here: https://www.mail-archive.com/wikibugs-l@lists.wikimedia.org/msg53602.html. In the file AccessControlPanel.body.php I replaced the lines

function AccessControlPanel() {
SpecialPage::SpecialPage( 'AccessControlPanel', 'protect' );
}

by

function AccessControlPanel() {
parent::__construct( 'AccessControlPanel', 'protect' );
}

as suggested and now it works again. There should be a version control to choose the old behaviour in old mediawikis and change to the new in Mediawiki 1.23