Internal error

[30cdb765b31f7002e5b0081e] /wiki/index.php?title=Special:ArticleFeedbackv5/AppSuite:Debugging_the_UI Error from line 489 of /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/ArticleFeedbackv5.render.php: Call to a member function escaped() on string

Backtrace:

#0 /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/ArticleFeedbackv5.render.php(452): ArticleFeedbackv5Render->renderPermalinkTimestamp(ArticleFeedbackv5Model)
#1 /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/ArticleFeedbackv5.render.php(371): ArticleFeedbackv5Render->feedbackHead(string, ArticleFeedbackv5Model)
#2 /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/ArticleFeedbackv5.render.php(83): ArticleFeedbackv5Render->render(ArticleFeedbackv5Model)
#3 /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/SpecialArticleFeedbackv5.php(485): ArticleFeedbackv5Render->run(ArticleFeedbackv5Model)
#4 /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/SpecialArticleFeedbackv5.php(438): SpecialArticleFeedbackv5->buildListing(ArticleFeedbackv5Render, DataModelList)
#5 /var/www/wiki.open-xchange.com/wiki/extensions/ArticleFeedbackV5/SpecialArticleFeedbackv5.php(197): SpecialArticleFeedbackv5->buildContent(ArticleFeedbackv5Render, DataModelList)
#6 /var/www/wiki.open-xchange.com/wiki/includes/specialpage/SpecialPage.php(522): SpecialArticleFeedbackv5->execute(string)
#7 /var/www/wiki.open-xchange.com/wiki/includes/specialpage/SpecialPageFactory.php(568): SpecialPage->run(string)
#8 /var/www/wiki.open-xchange.com/wiki/includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext)
#9 /var/www/wiki.open-xchange.com/wiki/includes/MediaWiki.php(861): MediaWiki->performRequest()
#10 /var/www/wiki.open-xchange.com/wiki/includes/MediaWiki.php(524): MediaWiki->main()
#11 /var/www/wiki.open-xchange.com/wiki/index.php(42): MediaWiki->run()
#12 {main}