Fatal error: Uncaught Error: Class "Doctrine\DBAL\Event\SchemaEventArgs" not found in /home/alkhalaffamily/public_html/past_videos/vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaAlterTableAddColumnEventArgs.php:17 Stack trace: #0 {main} thrown in /home/alkhalaffamily/public_html/past_videos/vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaAlterTableAddColumnEventArgs.php on line 17