Exception encountered, of type "Error"
[fa54d6a849b5d83edaee9f7d] /mediawiki/index.php?title=MediaWiki_Tips&diff=276&oldid=275 Error from line 283 of /opt/mediawiki-git/extensions.norm/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.class.php: Class 'Symfony\Component\Process\ProcessBuilder' not found
Backtrace:
#0 /opt/mediawiki-git/extensions.norm/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.class.php(127): SyntaxHighlight_GeSHi::highlight(string, string, array)
#1 /opt/mediawiki-git/includes/parser/Parser.php(4262): SyntaxHighlight_GeSHi::parserHook(string, array, Parser, PPFrame_DOM)
#2 /opt/mediawiki-git/includes/parser/Preprocessor_DOM.php(1260): Parser->extensionSubstitution(array, PPFrame_DOM)
#3 /opt/mediawiki-git/includes/parser/Parser.php(3366): PPFrame_DOM->expand(DOMElement, integer)
#4 /opt/mediawiki-git/includes/parser/Parser.php(1248): Parser->replaceVariables(string)
#5 /opt/mediawiki-git/includes/parser/Parser.php(446): Parser->internalParse(string)
#6 /opt/mediawiki-git/includes/content/WikitextContent.php(331): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#7 /opt/mediawiki-git/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#8 /opt/mediawiki-git/includes/poolcounter/PoolWorkArticleView.php(139): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#9 /opt/mediawiki-git/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#10 /opt/mediawiki-git/includes/page/WikiPage.php(1076): PoolCounterWork->execute()
#11 /opt/mediawiki-git/includes/diff/DifferenceEngine.php(636): WikiPage->getParserOutput(ParserOptions, integer)
#12 /opt/mediawiki-git/includes/diff/DifferenceEngine.php(614): DifferenceEngine->getParserOutput(WikiPage, Revision)
#13 /opt/mediawiki-git/includes/diff/DifferenceEngine.php(456): DifferenceEngine->renderNewRevision()
#14 /opt/mediawiki-git/includes/page/Article.php(787): DifferenceEngine->showDiffPage(boolean)
#15 /opt/mediawiki-git/includes/page/Article.php(498): Article->showDiffPage()
#16 /opt/mediawiki-git/includes/actions/ViewAction.php(44): Article->view()
#17 /opt/mediawiki-git/includes/MediaWiki.php(503): ViewAction->show()
#18 /opt/mediawiki-git/includes/MediaWiki.php(288): MediaWiki->performAction(Article, Title)
#19 /opt/mediawiki-git/includes/MediaWiki.php(745): MediaWiki->performRequest()
#20 /opt/mediawiki-git/includes/MediaWiki.php(519): MediaWiki->main()
#21 /opt/mediawiki-git/index.php(43): MediaWiki->run()
#22 {main}