Was getting a message when trying to create a webform.
Found: https://www.drupal.org/project/drupal/issues/2755791#comment-15182178
Made changes suggested in Post #19.
diff --git a/core/core.libraries.yml b/core/core.libraries.yml index 7fcc59f4..b0326425 100644 --- a/core/core.libraries.yml +++ b/core/core.libraries.yml @@ -383,6 +383,7 @@ drupal.ajax: - core/drupal - core/drupalSettings - core/drupal.progress + - core/internal.jquery.form - core/once - core/tabbable - core/loadjs
