Fatal error: Uncaught Error: Class "Doctrine\DBAL\Platforms\AbstractPlatform" not found in E:\xampp\htdocs\stms\vendor\doctrine\dbal\src\Platforms\DB2Platform.php:31 Stack trace: #0 {main} thrown in E:\xampp\htdocs\stms\vendor\doctrine\dbal\src\Platforms\DB2Platform.php on line 31