Thread:Extension talk:ArticleFeedback/Fatal error: Call to undefined method OutputPage::addModules() in /var/lib/mediawiki/extensions/ClickTracking/ClickTracking.hooks.php on line 73/reply (2)

As mentioned on Extension:ArticleFeedback, this extension is still very new and only works in MediaWiki 1.18+. This extension does not support MediaWiki 1.15. Either upgrade the wiki to the 1.18alpha version, or wait until 1.18 is stable with using this extension.