What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Have you checked your email notification settings? It seems the email body is blank or set to undefined in one of your forms. I see you have a couple of forms being edited and not sure which one is having the problem.
1. Click "Emails" and click a notification to edit it.
2. You'll then see the "Compose Email" window, you can see if everything is setup properly. You can click the form fields at the right to add it in your email body.
3. You can also delete the existing notification and setup a new one instead. Here's a guide on how to setup a new notification: https://www.jotform.com/help/25-Setting-Up-Email-Notifications
Let us know if that works.