Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\SchemaEventArgs" not found in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/doctrine/dbal/src/Event/SchemaAlterTableAddColumnEventArgs.php:17 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/doctrine/dbal/src/Event/SchemaAlterTableAddColumnEventArgs.php on line 17