It is not possible to send the embedded form

Hi, 
It is not possible to send the form after filling it in on our website. normally it works. But since march 1 it doesn't work

The button "submit" doesn't work

Can you take a look?

Username: Petervanderwulp

Have you added new plugins to your web site? It seems there is now a script conflict on the page. I can suggest to try re-embedding form using its iframe code. Here is how to get it: Getting-the-Form-iFrame-Code