Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\Loader" not found in /home/itounkj/anais/prestashop/src/PrestaShopBundle/Routing/YamlModuleLoader.php:37 Stack trace: #0 {main} thrown in /home/itounkj/anais/prestashop/src/PrestaShopBundle/Routing/YamlModuleLoader.php on line 37