Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in D:\xampp\htdocs\bkash-biller-portal-app\backup_21_01_2026\vendor\symfony\mailer\Event\FailedMessageEvent.php:20 Stack trace: #0 {main} thrown in D:\xampp\htdocs\bkash-biller-portal-app\backup_21_01_2026\vendor\symfony\mailer\Event\FailedMessageEvent.php on line 20