Fatal error: Uncaught Error: Interface "Drupal\Core\Database\Query\AlterableInterface" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Entity/Query/QueryInterface.php:15 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Entity/Query/QueryInterface.php on line 15