Fatal error: Uncaught Error: Class "Symfony\Component\Notifier\Exception\InvalidArgumentException" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\notifier\Exception\IncompleteDsnException.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\notifier\Exception\IncompleteDsnException.php on line 17