Internal error

[2f3f1a652f7558ac7b95b95f] /w/index.php?title=Special:Book&bookcmd=render_article&arttitle=Tutorials%3AMain&oldid=8573&writer=rl Error from line 231 of /var/www/public_wiki/w/extensions/Collection/RenderingAPI.php: Call to undefined function wfProfileIn()

Backtrace:

#0 /var/www/public_wiki/w/extensions/Collection/RenderingAPI.php(69): MWServeRenderingAPI->makeRequest(string, array)
#1 /var/www/public_wiki/w/extensions/Collection/RenderingAPI.php(44): CollectionRenderingAPI->doRender(array)
#2 /var/www/public_wiki/w/extensions/Collection/Collection.body.php(1012): CollectionRenderingAPI->render(array)
#3 /var/www/public_wiki/w/extensions/Collection/Collection.body.php(1216): SpecialCollection->renderCollection(array, Title, string)
#4 /var/www/public_wiki/w/extensions/Collection/Collection.body.php(273): SpecialCollection->renderArticle(Title, integer, string)
#5 /var/www/public_wiki/w/includes/specialpage/SpecialPage.php(575): SpecialCollection->execute(NULL)
#6 /var/www/public_wiki/w/includes/specialpage/SpecialPageFactory.php(611): SpecialPage->run(NULL)
#7 /var/www/public_wiki/w/includes/MediaWiki.php(296): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext)
#8 /var/www/public_wiki/w/includes/MediaWiki.php(900): MediaWiki->performRequest()
#9 /var/www/public_wiki/w/includes/MediaWiki.php(527): MediaWiki->main()
#10 /var/www/public_wiki/w/index.php(44): MediaWiki->run()
#11 {main}