Fatal error: Uncaught Error: Class "Drupal\Core\Ajax\AjaxResponse" not found in /home/fnbrshareacopy/public_html/modules/contrib/webform/src/Ajax/WebformSubmissionAjaxResponse.php:15 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/webform/src/Ajax/WebformSubmissionAjaxResponse.php on line 15