Email is blank

I have several forms and for some reason 3 of them are not working correctly. The emails I receive are blank. How do I fix this. 

I checked one of your forms. This happened because your notifier settings show the email template with no field tags.

To resolve this, simply delete and re-create the notifier by following these steps:

Select the Notification email you want to delete.

In the Compose Email window, click Delete E-mail button then click OK on the confirmation window to delete the opened Notification.

The you can re-build the notifiers.