Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\Loader" not found in /home2/zpcu9479/app.gennia.fr/vendor/symfony/config/Loader/FileLoader.php:26 Stack trace: #0 {main} thrown in /home2/zpcu9479/app.gennia.fr/vendor/symfony/config/Loader/FileLoader.php on line 26