Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Event\SchemaEventArgs' not found in /home/kingelearn/public_html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaDropTableEventArgs.php:12 Stack trace: #0 {main} thrown in /home/kingelearn/public_html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaDropTableEventArgs.php on line 12