Internal error

[b2031743da10be6c8184af96] /wiki/Category:500_H.E._Harris_%26_Co. Error from line 628 of /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/extensions/DynamicPageList/includes/Parameters.php: Call to undefined method MediaWiki\MediaWikiServices::getContentLanguage()

Backtrace:

#0 [internal function]: DPL\Parameters->_namespace(string)
#1 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/extensions/DynamicPageList/includes/Parameters.php(82): call_user_func_array(array, array)
#2 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/extensions/DynamicPageList/includes/Parse.php(176): DPL\Parameters->__call(string, array)
#3 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/extensions/DynamicPageList/DynamicPageListHooks.php(300): DPL\Parse->parse(string, Parser, NULL, NULL, boolean)
#4 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(3426): DynamicPageListHooks::dplParserFunction(Parser, string, string, string, string, string, string)
#5 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(3127): Parser->callParserFunction(PPTemplateFrame_DOM, string, array)
#6 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Preprocessor_DOM.php(1277): Parser->braceSubstitution(array, PPTemplateFrame_DOM)
#7 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(3305): PPFrame_DOM->expand(DOMElement)
#8 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Preprocessor_DOM.php(1277): Parser->braceSubstitution(array, PPTemplateFrame_DOM)
#9 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Preprocessor_DOM.php(1727): PPFrame_DOM->expand(DOMElement, integer)
#10 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(3302): PPTemplateFrame_DOM->cachedExpand(string, PPNode_DOM)
#11 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Preprocessor_DOM.php(1277): Parser->braceSubstitution(array, PPFrame_DOM)
#12 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(2942): PPFrame_DOM->expand(DOMElement, integer)
#13 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(1293): Parser->replaceVariables(string)
#14 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/parser/Parser.php(443): Parser->internalParse(string)
#15 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/content/WikitextContent.php(323): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#16 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/content/AbstractContent.php(516): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#17 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/poolcounter/PoolWorkArticleView.php(144): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#18 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#19 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/page/Article.php(604): PoolCounterWork->execute()
#20 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/page/CategoryPage.php(69): Article->view()
#21 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/actions/ViewAction.php(68): CategoryPage->view()
#22 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/MediaWiki.php(500): ViewAction->show()
#23 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/MediaWiki.php(294): MediaWiki->performAction(CategoryTreeCategoryPage, Title)
#24 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/MediaWiki.php(861): MediaWiki->performRequest()
#25 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/includes/MediaWiki.php(524): MediaWiki->main()
#26 /customers/a/3/a/jigsaw-wiki.com/httpd.www/w/index.php(42): MediaWiki->run()
#27 {main}