Fatal error: Uncaught Error: Class 'Symfony\Component\Notifier\Exception\IncompleteDsnException' not found in C:\xampp\htdocs\plugins\Symfony\Component\Notifier\Exception\MissingRequiredOptionException.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Notifier\Exception\MissingRequiredOptionException.php on line 17