Live form validation in lightbox?

Hi, I’d like to show a Mailchimp form in a lightbox. This works fine, except that any error/succes messages show in the lightbox after reloading the page… Which means I only see the message if I open the lightbox AGAIN.

Is live validation possible? So that the lightbox doesn’t have to close before giving me an error/succes message?

https://www.ads-software.com/plugins/mailchimp-for-wp/