Fatal error: Uncaught Error: Class "Drupal\webform\EntitySettings\WebformEntitySettingsBaseForm" not found in /home/www/drupal8/test/modules/webform/src/EntitySettings/WebformEntitySettingsFormForm.php:18
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/modules/webform/src/EntitySettings/WebformEntitySettingsFormForm.php on line 18