Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\TransactionEventArgs" not found in C:\mywamp\sites\allsite\microfinance2\vendor\doctrine\dbal\src\Event\TransactionRollBackEventArgs.php:7 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\microfinance2\vendor\doctrine\dbal\src\Event\TransactionRollBackEventArgs.php on line 7