Ninja Form Bug

I followed the following instructions to add a contact form button.

Navigate to Ninja Forms – Add new form
Select the “GeoDirectory Contact form”
Edit and save the form.
Visit WP – Appearance – Widgets
Add GD > Ninja Forms Widget to Sidebar, and set for Display on Detail Page

However, when I choose a form from the drop-down or change the text, the button automatically disappears from the details page.

What should I do? I’ve tried a few times with no success.

Also once this works I’m assuming it sends to the email in the listing, how can I modify the actual subject line and the contents of the email outside of the form data? E.g. brand the email so that the listing owner knows it’s from us.

Happy to give you access to troubleshoot if you send me a private message.