Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Driver\AbstractException' not found in E:\xampp\htdocs\www\qr251\vendor\doctrine\dbal\src\Driver\Mysqli\Exception\InvalidCharset.php:15 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr251\vendor\doctrine\dbal\src\Driver\Mysqli\Exception\InvalidCharset.php on line 15