Cannot use page builder

Hello !

First of all I would like to say thank you for this tool! But today I encounter a blockage in the layout / design of my site. I am currently using the Woocommerce Kallyas theme and the page builder included.

But when I activate the page builder mode, it doesn’t display anything on the page. I have to deactivate it to bring up the content of the product builder.

I am looking to use the page builder to add text and image before and after the product builder as I did on my other pages. How could I add a section to the product builder page?

I have a final question regarding permalinks. Is it possible to modify it as presented below?
https://mywebsite.fr/woo_product_builder/configurateur-pc/
by
https://mywebsite.fr/configurateur-pc/

Thanks in advance for your help.
Regards,
Jeff