Hello,
The File generator option is created to speed up the site performance and avoid calling the styles of elements that you don’t use on your site.
Select elements that are used on your site and click on Generate button > check frontend of the site, if the styling of some elements, for example, widgets in sidebar, will be broken, go back to the generator > – https://prnt.sc/y8z9sn Anyway, you will be able to delete the generated file at all – https://prnt.sc/y8zgg3 if something goes wrong.
Regards