Mailchimp error

Hello!
We are trying to get the popup to work with mailchimp.

We created the popup following the guide, but going to test it gives a error.

It does not register us for the newsletter.

We don’t know how to solve.

You can see the popup on the festivaldanzaestate.it website at the bottom left.

You can try a sign in.

Using only mailchimp without popup generator works correctly.

Thanks See you soon

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