Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\FileLoader" not found in /users/ms-it/www/oc/lib/composer/symfony/routing/Loader/YamlFileLoader.php:29 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/lib/composer/symfony/routing/Loader/YamlFileLoader.php on line 29