Fatal error: Uncaught Error: Class "Drupal\Core\Config\Entity\DraggableListBuilder" not found in /home/www/drupal8/test/core/modules/search/src/SearchPageListBuilder.php:22 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/search/src/SearchPageListBuilder.php on line 22