Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Platforms\AbstractMySQLPlatform' not found in E:\xampp\htdocs\www\qr251\vendor\doctrine\dbal\src\Platforms\MySQLPlatform.php:9 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr251\vendor\doctrine\dbal\src\Platforms\MySQLPlatform.php on line 9