safari will not load fox news on my iMac

I have had no Foxnews site access issues with any version of Safari on Catalina since it was introduced in Fall 2019, other than Foxnews popping a dialog chastising me for using an ad blocker. I run absolutely no anti-virus software, or associated Safari extensions that might interfere with the Foxnews site.

Quit Safari. Hold the shift key when launching Safari again. In Safari Preferences : Advanced : [√] Show Develop menu in menu bar. Press ⌥⌘E to clear your browser cache, and then Safari menu : Clear History… [ All history ] and click Clear History. If you have any Safari Extensions installed, I suggest that you deselect them (or uninstall) one at a time to see if they are impacting your Foxnews browsing experience. Quit Safari.

At this point, your Cache, cookies, and history are gone. Though unlikely, you may have ad/malware installed that is contributing to the issue. You might consider downloading and running the free Malwarebytes which is purposely built to find and remove that cruft. There is a removal item on its Help menu.

Relaunch Safari, and see if you can access the Foxnews site.

Not an issue accessing Foxnews here with Safari 13.1.2 or Safari 14.0 on macOS Catalina 10.15.6 (19G2021). This does not excuse Safari 14 from frequent scrolling freezes, and other first release issues.

I have exactly one extension loaded in Safari 13.1.2 that I have used (and kept updated) since Mojave. There must be something installed on your Mac that is causing the interference in Safari. What changed over a month ago that initiated this change in Fox news viewing in Safari? Blocking all Cookies? Disabled JavaScript? Is Safari Preferences : Websites : Pop-Up Windows set to Block for Foxnews?