Works perfectly fine for me on FF with uBO and all scripts blocked. Apparently that "Sorry, ..." comes from a cookie popup which I don't even see so seems like you need stronger blocking in your browser.
I have all scripts blocked with NoScript and saw it. I enabled redhat.com and the site rendered but took obscene liberties with polluting the back history after scrolling down.
There is a tag ###seckit-noscript-tag which shows up with uBlock Origin under 'Cosmetic Filters' which lets you view it without enabling JS (disabling NoScript on Firefox).