On this page, I have this error:
[2d8fa295b759a37197da6c61] /wiki/Mod%C3%A8le:Lien_Wikip%C3%A9dia Error from line 38 of /var/www/wikidebats.org/w/extensions/WikipediaExtracts/WikipediaExtractsError.php: Access to undeclared static property: WikipediaExtracts::$contentLanguage
Backtrace:
#0 /var/www/wikidebats.org/w/extensions/WikipediaExtracts/WikipediaExtracts.php(51): WikipediaExtractsError->getHtmlMessage()
#1 /var/www/wikidebats.org/w/includes/parser/Parser.php(3426): WikipediaExtracts::onFunctionHook(Parser, string, string, string)
#2 /var/www/wikidebats.org/w/includes/parser/Parser.php(3127): Parser->callParserFunction(PPTemplateFrame_DOM, string, array)
#3 /var/www/wikidebats.org/w/includes/parser/Preprocessor_DOM.php(1277): Parser->braceSubstitution(array, PPTemplateFrame_DOM)
#4 /var/www/wikidebats.org/w/includes/parser/Parser.php(3305): PPFrame_DOM->expand(DOMElement)
#5 /var/www/wikidebats.org/w/includes/parser/Preprocessor_DOM.php(1277): Parser->braceSubstitution(array, PPFrame_DOM)
#6 /var/www/wikidebats.org/w/includes/parser/Parser.php(2942): PPFrame_DOM->expand(DOMElement, integer)
#7 /var/www/wikidebats.org/w/includes/parser/Parser.php(1293): Parser->replaceVariables(string)
#8 /var/www/wikidebats.org/w/includes/parser/Parser.php(443): Parser->internalParse(string)
#9 /var/www/wikidebats.org/w/includes/content/WikitextContent.php(323): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#10 /var/www/wikidebats.org/w/includes/content/AbstractContent.php(516): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#11 /var/www/wikidebats.org/w/includes/poolcounter/PoolWorkArticleView.php(144): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#12 /var/www/wikidebats.org/w/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#13 /var/www/wikidebats.org/w/includes/page/Article.php(604): PoolCounterWork->execute()
#14 /var/www/wikidebats.org/w/includes/actions/ViewAction.php(68): Article->view()
#15 /var/www/wikidebats.org/w/includes/MediaWiki.php(500): ViewAction->show()
#16 /var/www/wikidebats.org/w/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#17 /var/www/wikidebats.org/w/includes/MediaWiki.php(861): MediaWiki->performRequest()
#18 /var/www/wikidebats.org/w/includes/MediaWiki.php(524): MediaWiki->main()
#19 /var/www/wikidebats.org/w/index.php(42): MediaWiki->run()
#20 {main}
How to resolve it? Thanks in advance!