Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\SchemaEventArgs" not found in I:\www\picman\vendor\doctrine\dbal\src\Event\SchemaAlterTableAddColumnEventArgs.php:19 Stack trace: #0 {main} thrown in I:\www\picman\vendor\doctrine\dbal\src\Event\SchemaAlterTableAddColumnEventArgs.php on line 19