无法最初在浏览器中加载cakephp index.php文件

Unable to load Cakephp index.php file initially in the browser. I have downloaded all the latest Cakephp-3.1.1 version from Github and placed it in my root folder. Initially when I tried loading it on browser nothing is coming then I checked in the console so it showed :

ERROR-1:Uncaught TypeError: Cannot read property 'setBadgeText' of undefined 'chrome-extension://gnniaejgfdelaafcjopndjdebjfnkljf/app.js:1'

ERROR-2:Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://localhost/cakework/cake/

I tried changing permissions to 777 to whole www folder which is my root.