Problems with Divi?

Hi,

I tried the free version but run into two issues, which holds me back from using the plugin.

1) In theme customizer, where you should customize the thank you page via this plugin is always in a reload loop. It opens it for 1 second and the reloads the page. In an endless loop acts like this. All other customizer pages (regular wordpress ones) work.
Only once I was able to get the loop to stop and was able to edit. But after saving changes now it has never stopped looping.
Tried different hacks including deactivating plugin and activating again but no.

2) I have a divi theme which uses a tempalte for cart and checkout from here (set4): https://www.elegantthemes.com/blog/divi-resources/download-the-first-free-cart-checkout-page-template-sets-for-divi
The thank you page with this plugin is not displayed correctly, it has elements from checkout and cart still visible.
Problems with divi and this plugin?

Happy to buy also the paid version and request support from there, if you can help in fixing these issues.