No, it's not working on dynamic content pages (see hidden content)
You miss my topic. I said from the start that the form is WORKING on normal sppb pages, like the one from your link, but it is NOT WORKING on dynamic content pages.
I mentioned this from the very first post, I guess you missed it.
*You can check the pages for yourself.
As you can see, the contact form works on the contact page, which is a default sppb page
However, the same contact returns an error on the dynamic content page
Same happens for the form builder addon.*