Him, we have an account sign up with many required and non-required fields. It is VERY difficult to know why the account isn't being created because there is no easily identifiable marking to show which field is missing data.

Usually I see a red outline or comment when this happens on other platforms.

Matrix might have a tiny triangle, but not always, to show where the error lies. Can you have a much more robust way to indicate required fields and which fields are missing if someone submits their form?