Fatal error: Uncaught Error: Interface 'Symfony\Component\Security\Core\User\UserProviderInterface' not found in /home/users/00/3c/21/home/www/vendor/kimai/user-bundle/Security/UserProvider.php:21 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/kimai/user-bundle/Security/UserProvider.php on line 21