Using with Divi – please help!

I am just trying to use this plugin with Divi and running into issues… is it possible to control where messaging from the plugin appears when using a page builder?

I am using multiple free memberships as per: https://simple-membership-plugin.com/offering-multiple-free-memberships-site/

So I have embedded a registration form on a Divi page, but the success message appears before Divi content under the header.

Any tips or pointers for working with Simple Membership and Divi together?

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