Notification emails not sending because of "missing field"

Hi, 

I just realised my auto-responder emails are not sending because of missing fields. I never saw that message before. How to find out what field is missing and how to fix it? 

Cheers, 

Chris

You need to edit your form's auto-responder email alert and select the email field in "Recipient". Please check the screenshot below on how to solve this problem:

It seems you have already solved this problem. Do get back to us if you have any questions.