Is it case sensitive? Do you have your local server running? If you type the url in directly in the browser does it work? http://localhost/BFSN-responsive-2015/index.php
Is this the site that is checked as the "Testing Server"?
(on a side note, I would uncheck the "Automatically upload files to server on save" check box... it isn't your issue, but our wizards open and save a lot of files very quickly and this option has been known to cause issues in some cases)