Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Driver\AbstractException' not found in C:\xampp\htdocs\dpbb\vendor\doctrine\dbal\src\Driver\OCI8\Exception\ConnectionFailed.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\dpbb\vendor\doctrine\dbal\src\Driver\OCI8\Exception\ConnectionFailed.php on line 17