Certain common sites no longer load on Safari
Certain sites no longer load on Safari. The sites are common ones, such as washingtonpost.com, that load well in Firefox and Chrome. I get the early part of a loaded page, usually about two thirds of a single screen. The graphics are mostly missing and no links work. I usually have to force quit Safari, and I can't make changes to its preferences. Rebooting doesn't help.
This has been going on for at least a month.
I'm on Catalina 10.15.5, and Safari is 13.1.1. I have a MacBook Air (Retina, 13-inch, 2018).
I saw this solution to a similar problem two months ago, but it purports to be for High Sierra only: https://discussions.apple.com/thread/251213636?login=true
MacBook Air 13″, macOS 10.15