Fatal error: Uncaught Error: Class "Zend_Feed_Pubsubhubbub_Model_ModelAbstract" not found in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\diablomedia\zendframework1\library\Zend\Feed\Pubsubhubbub\Model\Subscription.php:30 Stack trace: #0 {main} thrown in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\diablomedia\zendframework1\library\Zend\Feed\Pubsubhubbub\Model\Subscription.php on line 30