WHY CAN I NOT LOAD CERTAIN SITES WHEN THEY WERE WORKING PERFECTLY FINE A FEW DAY AGO

Hi Ross, what happens when you try to load those sites? For example, Firefox says it can't find the server or the page; the site returns an error like unauthorized; you just get a blank page, etc.

Could you try in a private window (Ctrl+Shift+P) and see whether you can load the sites there?