Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in /var/www/html/vendor/doctrine/doctrine-migrations-bundle/DependencyInjection/DoctrineMigrationsExtension.php:19 Stack trace: #0 {main} thrown in /var/www/html/vendor/doctrine/doctrine-migrations-bundle/DependencyInjection/DoctrineMigrationsExtension.php on line 19