Block CSS files

Hello, I am using the LiteSpeed cache plugin that does a good job but what really delays my site are these 404 CSS files as you can see in the waterfall at:
https://sitespeed.gr/result/240221_3S_57/1/details/#waterfall_view_step1

Can I block them some how using the LiteSpeed plugin? Or do I have to erase them from the theme code so the site will run faster?

Thanks
Giorgos