Fatal error: Uncaught Error: Class 'Zend_Feed_Pubsubhubbub_Model_ModelAbstract' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables\libreria\Zend\Feed\Pubsubhubbub\Model\Subscription.php:39
Stack trace:
#0 {main}
  thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables\libreria\Zend\Feed\Pubsubhubbub\Model\Subscription.php on line 39