Exception encountered, of type "Error"
[568025fe] /index.php?title=Howto_long-term_debug_with_beroNet%27s_tool_%22PowerDebug%22&diff=7686&oldid=7685 Error from line 248 of /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/extensions/CategoryTree/CategoryTreeFunctions.php: Class 'Services_JSON' not found
Backtrace:
#0 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/extensions/CategoryTree/CategoryTreeFunctions.php(264): CategoryTree::getJsonCodec()
#1 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/extensions/CategoryTree/CategoryTreeFunctions.php(321): CategoryTree::encodeOptions(array, string)
#2 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/extensions/CategoryTree/CategoryTreeFunctions.php(442): CategoryTree->getOptionsAsJsStructure()
#3 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/extensions/CategoryTree/CategoryTree.php(374): CategoryTree->getTag(Parser, string, NULL, array, integer, PPFrame_DOM)
#4 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/parser/Parser.php(4234): efCategoryTreeParserHook(string, array, Parser, PPFrame_DOM)
#5 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/parser/Preprocessor_DOM.php(1262): Parser->extensionSubstitution(array, PPFrame_DOM)
#6 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/parser/Parser.php(3342): PPFrame_DOM->expand(DOMElement, integer)
#7 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/parser/Parser.php(1239): Parser->replaceVariables(string)
#8 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/parser/Parser.php(439): Parser->internalParse(string)
#9 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/content/WikitextContent.php(331): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#10 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#11 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/poolcounter/PoolWorkArticleView.php(139): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#12 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#13 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/page/WikiPage.php(1126): PoolCounterWork->execute()
#14 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/diff/DifferenceEngine.php(616): WikiPage->getParserOutput(ParserOptions, integer)
#15 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/diff/DifferenceEngine.php(594): DifferenceEngine->getParserOutput(WikiPage, Revision)
#16 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/diff/DifferenceEngine.php(455): DifferenceEngine->renderNewRevision()
#17 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/page/Article.php(797): DifferenceEngine->showDiffPage(boolean)
#18 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/page/Article.php(508): Article->showDiffPage()
#19 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/actions/ViewAction.php(44): Article->view()
#20 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/MediaWiki.php(490): ViewAction->show()
#21 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/MediaWiki.php(287): MediaWiki->performAction(Article, Title)
#22 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/MediaWiki.php(714): MediaWiki->performRequest()
#23 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/includes/MediaWiki.php(508): MediaWiki->main()
#24 /mnt/web323/a1/17/53822817/htdocs/mediawiki-1.26.2/index.php(41): MediaWiki->run()
#25 {main}