Contact form sends blank

Hi. When someone fills out our membership form on our page, which is a contact 7 form, all we get in our email is a blank response, that sends to us something like this.

From: [your-name] <[email protected]>
Subject: [your-subject]

Message Body:
[your-message]

—
This e-mail was sent from the membership form on Peaceful Village
(https://peaceful-village.com/membership)
—-

I would like to know how to fix this? I have a Flamingo plugin that somewhat helps with this, and sends the submitted forms to my dashboard, but it is still not 100% perfect. I would like to fix this problem. Thank you for any help with this.

The page I need help with: [log in to see the link]