The page you’ve linked just has a newsletter form. Is that the form you’re asking about? Furthermore, there’s an error about submit event not being attached:
Thanks for the quick response. The form that I was asking for was the one with id=ecenda-signup-form.
I had forgotten about the main.js script file, it could be that or some typos in the HTML form itself that had caused the issue. But now I have cleaned it up again and both forms are working as expected with netlify handling.
Thanks