I can't install generate pro on an Elementor site

Good morning,

I tried to install generatepress pro on the domain that I insert below, but I can't install it because there is a warning that say the "style.css" file is missing... if I install the free version of the theme I have no problems.

The only thing that differs from other sites I use generatepress pro theme on is that this site is built with Elementor, I don't know if this can affect it in any way.

I currently have another theme installed on the site, but I would like to use generatepress pro.