I can’t get the custom fonts working

Hi,  I’ve got this error:  https://www.awesomescreenshot.com/image/30620176?key=467fbc2b400f1ac5a59cc6a7286738e5 I’m not understanding the self-hosted fonts system at all. Can you give me some coaching here? I’ve done what was instructed in the YouTube videos, but it’s not self-hosting the fonts at all.  Thanks!  Steve

Swiss Knife