Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Driver\AbstractException' not found in E:\xampp\htdocs\www\qr251\vendor\doctrine\dbal\src\Driver\OCI8\Exception\InvalidConfiguration.php:10 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr251\vendor\doctrine\dbal\src\Driver\OCI8\Exception\InvalidConfiguration.php on line 10