Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\TransactionEventArgs" not found in C:\xampp\htdocs\Locsy\vendor\doctrine\dbal\src\Event\TransactionBeginEventArgs.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Locsy\vendor\doctrine\dbal\src\Event\TransactionBeginEventArgs.php on line 8