Fatal error: Uncaught Error: Class "Doctrine\DBAL\Driver\AbstractException" not found in D:\Apache24\www\dls\back-end\vendor\doctrine\dbal\src\Driver\Mysqli\Exception\ConnectionFailed.php:15 Stack trace: #0 {main} thrown in D:\Apache24\www\dls\back-end\vendor\doctrine\dbal\src\Driver\Mysqli\Exception\ConnectionFailed.php on line 15