Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\FileLoader" not found in /var/www/html/API_Forum/vendor/symfony/config/Definition/Loader/DefinitionFileLoader.php:27 Stack trace: #0 {main} thrown in /var/www/html/API_Forum/vendor/symfony/config/Definition/Loader/DefinitionFileLoader.php on line 27