Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in C:\xampp\htdocs\hannoole\PMS\vendor\phpro\grumphp\src\Event\Event.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\PMS\vendor\phpro\grumphp\src\Event\Event.php on line 16