Different Website: contact form not working?

Hi,

Recently I had submitted a ticket on "unknown contact form" for our site, avia.ainterpreting.com, to which I received a response that multi-forms are not doable, only one form.

So now with that in mind, I am trying to add a new contact form on a separate website, new.ainterpreting.com, which is a separate entiety from the previous website. And it provides this error message, "unknown contact form".

I dont want to assume here but both sites are still linked because they share the same domain name even though there's no direct links between them, hence only one form works, am I right?

Can you pls look into this and confirm for me?

thanks,
Smitha