Our default configuration for PHP scripts files uses PHP 4 which in this case appears to be failing due to the use of some PHP 5 functionality.
Per our Php5 Wiki page
I've added the .htaccess code to use PHP 5.6 to your "Site" directory and it appears to be working now.
If I can assist further let me know. When you're ready for production, you'll probably want to move that .htaccess file to your site's root so that PHP 5.6 will be in effect for all subdirectories.