Error log and contents

Fri, 07 Oct 2016 22:54:47 +0000
Message: Declaration of wcf\system\html\output\AmpHtmlOutputProcessor::process($html, $objectType, $objectID) should be compatible with wcf\system\html\output\HtmlOutputProcessor::process($html, $objectType, $objectID, $doKeywordHighlighting = true)
PHP version: 7.0.11
WCF version: 3.0.0 Beta 2
Request URI: /article-amp/2-beta-2-of-woltlab-suite-3-installed/
Referrer: 
User Agent: Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
Peak Memory Usage: 6085584/268435456
======
Error Class: wcf\system\exception\ErrorException
Error Message: Declaration of wcf\system\html\output\AmpHtmlOutputProcessor::process($html, $objectType, $objectID) should be compatible with wcf\system\html\output\HtmlOutputProcessor::process($html, $objectType, $objectID, $doKeywordHighlighting = true)
Error Code: 0
File: /home/xxxxxxx/public_html/lib/system/WCF.class.php (293)
Extra Information: -
Stack Trace: [{"file":"\/home\/xxxxxxx\/public_html\/lib\/system\/html\/output\/AmpHtmlOutputProcessor.class.php","line":17,"function":"handleError","class":"wcf\\system\\WCF","type":"::","args":[2,"Declaration of wcf\\system\\html\\output\\AmpHtmlOutputProcessor::process($html, $objectType, $objectID) should be compatible with wcf\\system\\html\\output\\HtmlOutputProcessor::process($html, $objectType, $objectID, $doKeywordHighlighting = true)","\/home\/xxxxxxx\/public_html\/lib\/system\/html\/output\/AmpHtmlOutputProcessor.class.php",17,{"className":"[redacted]","namespaces":"[redacted]","applicationPrefix":"[redacted]","classPath":"[redacted]"}]},{"file":"\/home\/xxxxxxx\/public_html\/lib\/system\/WCF.class.php","line":688,"args":["\/home\/xxxxxxx\/public_html\/lib\/system\/html\/output\/AmpHtmlOutputProcessor.class.php"],"function":"require_once","class":"","type":""},{"function":"autoload","class":"wcf\\system\\WCF","type":"::","args":["wcf\\system\\html\\output\\AmpHtmlOutputProcessor"],"file":"[internal function]","line":"?"},{"file":"\/home\/xxxxxxx\/public_html\/lib\/data\/article\/content\/ArticleContent.class.php","line":103,"function":"spl_autoload_call","args":["wcf\\system\\html\\output\\AmpHtmlOutputProcessor"],"class":"","type":""},{"function":"getAmpFormattedContent","class":"wcf\\data\\article\\content\\ArticleContent","type":"->","args":[],"file":"[internal function]","line":"?"},{"file":"\/home\/xxxxxxx\/public_html\/lib\/data\/DatabaseObjectDecorator.class.php","line":86,"function":"call_user_func_array","args":[["[redacted]","[redacted]"],[]],"class":"","type":""},{"file":"\/home\/xxxxxxx\/public_html\/templates\/compiled\/0_wcf_2_ampArticle.php","line":332,"function":"__call","class":"wcf\\data\\DatabaseObjectDecorator","type":"->","args":["getAmpFormattedContent",[]]},{"file":"\/home\/xxxxxxx\/public_html\/lib\/system\/template\/TemplateEngine.class.php","line":320,"args":["\/home\/xxxxxxx\/public_html\/templates\/compiled\/0_wcf_2_ampArticle.php"],"function":"include","class":"","type":""},{"file":"\/home\/xxxxxxx\/public_html\/lib\/page\/AbstractPage.class.php","line":300,"function":"display","class":"wcf\\system\\template\\TemplateEngine","type":"->","args":["ampArticle","wcf"]},{"file":"\/home\/xxxxxxx\/public_html\/lib\/page\/AbstractPage.class.php","line":97,"function":"show","class":"wcf\\page\\AbstractPage","type":"->","args":[]},{"file":"\/home\/xxxxxxx\/public_html\/lib\/system\/request\/Request.class.php","line":83,"function":"__run","class":"wcf\\page\\AbstractPage","type":"->","args":[]},{"file":"\/home\/xxxxxxx\/public_html\/lib\/system\/request\/RequestHandler.class.php","line":92,"function":"execute","class":"wcf\\system\\request\\Request","type":"->","args":[]},{"file":"\/home\/xxxxxxx\/public_html\/index.php","line":9,"function":"handle","class":"wcf\\system\\request\\RequestHandler","type":"->","args":["wcf"]}]