Internal error

[47152636e9f6ca80da5c17e5] /User:Elaine_Lonnemann Error: Class "Smarty" not found

Backtrace:

from /var/www/mediawiki1_39/extensions/Widgets/WidgetRenderer.php(31)
#0 /var/www/mediawiki1_39/includes/parser/Parser.php(3443): WidgetRenderer::renderWidget()
#1 /var/www/mediawiki1_39/includes/parser/Parser.php(3126): Parser->callParserFunction()
#2 /var/www/mediawiki1_39/includes/parser/PPFrame_Hash.php(276): Parser->braceSubstitution()
#3 /var/www/mediawiki1_39/includes/parser/Parser.php(2955): PPFrame_Hash->expand()
#4 /var/www/mediawiki1_39/includes/parser/Parser.php(1610): Parser->replaceVariables()
#5 /var/www/mediawiki1_39/includes/parser/Parser.php(724): Parser->internalParse()
#6 /var/www/mediawiki1_39/includes/content/WikitextContentHandler.php(301): Parser->parse()
#7 /var/www/mediawiki1_39/includes/content/ContentHandler.php(1721): WikitextContentHandler->fillParserOutput()
#8 /var/www/mediawiki1_39/includes/content/Renderer/ContentRenderer.php(47): ContentHandler->getParserOutput()
#9 /var/www/mediawiki1_39/includes/Revision/RenderedRevision.php(266): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput()
#10 /var/www/mediawiki1_39/includes/Revision/RenderedRevision.php(237): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached()
#11 /var/www/mediawiki1_39/includes/Revision/RevisionRenderer.php(221): MediaWiki\Revision\RenderedRevision->getSlotParserOutput()
#12 /var/www/mediawiki1_39/includes/Revision/RevisionRenderer.php(158): MediaWiki\Revision\RevisionRenderer->combineSlotOutput()
#13 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}()
#14 /var/www/mediawiki1_39/includes/Revision/RenderedRevision.php(199): call_user_func()
#15 /var/www/mediawiki1_39/includes/poolcounter/PoolWorkArticleView.php(91): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#16 /var/www/mediawiki1_39/includes/poolcounter/PoolWorkArticleViewCurrent.php(97): PoolWorkArticleView->renderRevision()
#17 /var/www/mediawiki1_39/includes/poolcounter/PoolCounterWork.php(162): PoolWorkArticleViewCurrent->doWork()
#18 /var/www/mediawiki1_39/includes/page/ParserOutputAccess.php(299): PoolCounterWork->execute()
#19 /var/www/mediawiki1_39/includes/page/Article.php(714): MediaWiki\Page\ParserOutputAccess->getParserOutput()
#20 /var/www/mediawiki1_39/includes/page/Article.php(528): Article->generateContentOutput()
#21 /var/www/mediawiki1_39/includes/actions/ViewAction.php(78): Article->view()
#22 /var/www/mediawiki1_39/includes/MediaWiki.php(542): ViewAction->show()
#23 /var/www/mediawiki1_39/includes/MediaWiki.php(322): MediaWiki->performAction()
#24 /var/www/mediawiki1_39/includes/MediaWiki.php(904): MediaWiki->performRequest()
#25 /var/www/mediawiki1_39/includes/MediaWiki.php(562): MediaWiki->main()
#26 /var/www/mediawiki1_39/index.php(50): MediaWiki->run()
#27 /var/www/mediawiki1_39/index.php(46): wfIndexMain()
#28 {main}