Fatal error: Uncaught Error: Interface "Symfony\Component\Validator\Mapping\Loader\LoaderInterface" not found in /home/wizilen/www/vendor/symfony/validator/Mapping/Loader/AttributeLoader.php:28 Stack trace: #0 {main} thrown in /home/wizilen/www/vendor/symfony/validator/Mapping/Loader/AttributeLoader.php on line 28