Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in /var/www/html/API_Forum/vendor/nelmio/cors-bundle/DependencyInjection/NelmioCorsExtension.php:22 Stack trace: #0 {main} thrown in /var/www/html/API_Forum/vendor/nelmio/cors-bundle/DependencyInjection/NelmioCorsExtension.php on line 22