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