Strange Bug affected many of my wordpress sites.

Hey guys i got a couple of sites hosted on WordPress on the same servers, strangely a single bug from them looks like has thrown the others.
I all show you the main one, its http://pugle.net/ as soon as you open it these message error shows:

Fatal error: Call to undefined function wp() in /home/content/p/u/g/pugle/html/pugle/wp-blog-header.php on line 16

And this is the script for wp-blog-header.php, it looks fine to me.

<?php
/**
* Loads the WordPress environment and template.
*
* @package WordPress
*/

if ( !isset($wp_did_header) ) {

$wp_did_header = true;

require_once( dirname(__FILE__) . ‘/wp-load.php’ );

wp(); LINE 16 WHERE ERROR IS SAID TO BE

require_once( ABSPATH . WPINC . ‘/template-loader.php’ );

}

?>

Does anyone know what could happen i wrote Godaddy and said it should be a scripting mistake, has anyone had this similar mistake before, if so please let me know how to fix it as i cant access the the Admin panel either. Thanx