Erro interno

[f01976581e8d2b9b4f94ecc7] /index.php/Teste_de_widget Error from line 29 of /var/www/html/extensions/Widgets/WidgetRenderer.php: Class 'Smarty' not found

Backtrace:

#0 /var/www/html/includes/parser/Parser.php(3341): WidgetRenderer::renderWidget()
#1 /var/www/html/includes/parser/Parser.php(3048): Parser->callParserFunction()
#2 /var/www/html/includes/parser/PPFrame_Hash.php(263): Parser->braceSubstitution()
#3 /var/www/html/includes/parser/Parser.php(2888): PPFrame_Hash->expand()
#4 /var/www/html/includes/parser/Parser.php(1557): Parser->replaceVariables()
#5 /var/www/html/includes/parser/Parser.php(652): Parser->internalParse()
#6 /var/www/html/includes/content/WikitextContent.php(374): Parser->parse()
#7 /var/www/html/includes/content/AbstractContent.php(590): WikitextContent->fillParserOutput()
#8 /var/www/html/includes/Revision/RenderedRevision.php(263): AbstractContent->getParserOutput()
#9 /var/www/html/includes/Revision/RenderedRevision.php(235): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached()
#10 /var/www/html/includes/Revision/RevisionRenderer.php(215): MediaWiki\Revision\RenderedRevision->getSlotParserOutput()
#11 /var/www/html/includes/Revision/RevisionRenderer.php(152): MediaWiki\Revision\RevisionRenderer->combineSlotOutput()
#12 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}()
#13 /var/www/html/includes/Revision/RenderedRevision.php(197): call_user_func()
#14 /var/www/html/includes/poolcounter/PoolWorkArticleView.php(216): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#15 /var/www/html/includes/poolcounter/PoolCounterWork.php(162): PoolWorkArticleView->doWork()
#16 /var/www/html/includes/page/Article.php(810): PoolCounterWork->execute()
#17 /var/www/html/includes/actions/ViewAction.php(80): Article->view()
#18 /var/www/html/includes/MediaWiki.php(531): ViewAction->show()
#19 /var/www/html/includes/MediaWiki.php(313): MediaWiki->performAction()
#20 /var/www/html/includes/MediaWiki.php(947): MediaWiki->performRequest()
#21 /var/www/html/includes/MediaWiki.php(547): MediaWiki->main()
#22 /var/www/html/index.php(53): MediaWiki->run()
#23 /var/www/html/index.php(46): wfIndexMain()
#24 {main}