Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\SchemaEventArgs" not found in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaAlterTableChangeColumnEventArgs.php:16 Stack trace: #0 {main} thrown in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaAlterTableChangeColumnEventArgs.php on line 16