Fatal error: Uncaught Error: Class "Drupal\Core\Entity\Form\DeleteMultipleForm" not found in /home/www/drupal8/test/core/modules/node/src/Form/DeleteMultiple.php:13 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/node/src/Form/DeleteMultiple.php on line 13