Fatal error: Uncaught Error: Class "Drupal\system\Plugin\views\field\BulkForm" not found in /home/www/drupal8/test/modules/views_send/src/Plugin/views/field/ViewsSend.php:16 Stack trace: #0 {main} thrown in /home/www/drupal8/test/modules/views_send/src/Plugin/views/field/ViewsSend.php on line 16