Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\User\UserProviderInterface" not found in C:\xampp\htdocs\BK\bateriasec\vendor\friendsofsymfony\user-bundle\Security\UserProvider.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BK\bateriasec\vendor\friendsofsymfony\user-bundle\Security\UserProvider.php on line 21