Warning: require_once(Zend/OpenId.php): failed to open stream: No such file or directory in C:\xampp-2\htdocs\inventory inc\lib\Zend\OpenId\Consumer.php on line 0

Fatal error: require_once(): Failed opening required 'Zend/OpenId.php' (include_path='C:\xampp-2\php\PEAR') in C:\xampp-2\htdocs\inventory inc\lib\Zend\OpenId\Consumer.php on line 0