Plugin don’t work with Divi

Maybe is not with Divi the problem? I don’t know, but I needed to asign another page for to checkout, and this page is built with Divi Builder. The checkout process it stays working a long time until at end says that it has been redirected too many times and the page goes blank. I have all the latest versions of WP, themes and plugins.

The page I need help with: [log in to see the link]