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