Exception encountered, of type "Error"
[X20e4Xo@TuPKBt0tnVIzhAAAAAU] /index.php?title=Tickets&diff=prev&oldid=668 Error from line 53 of /www/htdocs/brucon/2016/extensions/countdown.php: Call to undefined method Parser::unstrip()
Backtrace:
#0 /www/htdocs/brucon/2016/includes/parser/Parser.php(4279): renderCountdown()
#1 /www/htdocs/brucon/2016/includes/parser/Preprocessor_DOM.php(1260): Parser->extensionSubstitution()
#2 /www/htdocs/brucon/2016/includes/parser/Parser.php(3380): PPFrame_DOM->expand()
#3 /www/htdocs/brucon/2016/includes/parser/Parser.php(1261): Parser->replaceVariables()
#4 /www/htdocs/brucon/2016/includes/parser/Parser.php(452): Parser->internalParse()
#5 /www/htdocs/brucon/2016/includes/content/WikitextContent.php(331): Parser->parse()
#6 /www/htdocs/brucon/2016/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput()
#7 /www/htdocs/brucon/2016/includes/poolcounter/PoolWorkArticleView.php(139): AbstractContent->getParserOutput()
#8 /www/htdocs/brucon/2016/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#9 /www/htdocs/brucon/2016/includes/page/WikiPage.php(1079): PoolCounterWork->execute()
#10 /www/htdocs/brucon/2016/includes/diff/DifferenceEngine.php(636): WikiPage->getParserOutput()
#11 /www/htdocs/brucon/2016/includes/diff/DifferenceEngine.php(614): DifferenceEngine->getParserOutput()
#12 /www/htdocs/brucon/2016/includes/diff/DifferenceEngine.php(456): DifferenceEngine->renderNewRevision()
#13 /www/htdocs/brucon/2016/includes/page/Article.php(794): DifferenceEngine->showDiffPage()
#14 /www/htdocs/brucon/2016/includes/page/Article.php(503): Article->showDiffPage()
#15 /www/htdocs/brucon/2016/includes/actions/ViewAction.php(44): Article->view()
#16 /www/htdocs/brucon/2016/includes/MediaWiki.php(493): ViewAction->show()
#17 /www/htdocs/brucon/2016/includes/MediaWiki.php(288): MediaWiki->performAction()
#18 /www/htdocs/brucon/2016/includes/MediaWiki.php(735): MediaWiki->performRequest()
#19 /www/htdocs/brucon/2016/includes/MediaWiki.php(509): MediaWiki->main()
#20 /www/htdocs/brucon/2016/index.php(43): MediaWiki->run()
#21 {main}