This extension is currently under construction for improvements. We have disabled the emailing feature associated to this feature, which removes the key benefit to this feature.
With that said, the use case for this extension was something like, "Tell me when there is a time where an order ID is not present on my confirmation page" or "email me when the cart page is not showing all the product information."
I think you are wanting to validate that form data is filled in properly before submitting the form. This extension isn't suited for that use case. This would alert you if not all data is present on submit, but it wouldn't necessarily stop the submission of the form from happening.
Hope that helps.