Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\SchemaEventArgs" not found in C:\Xampp\www\0050467\ims-mobile\vendor\doctrine\dbal\src\Event\SchemaAlterTableChangeColumnEventArgs.php:18 Stack trace: #0 {main} thrown in C:\Xampp\www\0050467\ims-mobile\vendor\doctrine\dbal\src\Event\SchemaAlterTableChangeColumnEventArgs.php on line 18