Fatal error: Uncaught Error: Interface "Drupal\Core\Config\Entity\ConfigEntityStorageInterface" not found in /home/www/drupal8/test/core/modules/user/src/RoleStorageInterface.php:10 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/user/src/RoleStorageInterface.php on line 10