Fatal error: Uncaught Error: Interface "Drupal\Core\Plugin\Discovery\ContainerDeriverInterface" not found in /home/www/drupal8/test/core/modules/rest/src/Plugin/Deriver/EntityDeriver.php:14 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/rest/src/Plugin/Deriver/EntityDeriver.php on line 14