For me - the recipe (the one with The Economist logo on it) runs fine, and the first few articles display correctly. But everything from the letters page onward gives a paragraph or two followed by blurb asking me to sign up and talking about NewsGuard.
Here's one example of an article - which for me
looks like this (and looks similar on my Kobo Aura One).
Trying that article page in an incognito window, it
looks like a different layout, with an older header, and different signup text (with no mention of NewsGuard).
(Trying again in an incognito window, I've been given the "NewsGuard" version).
I would therefore guess that they're testing a new version of their website, with different protection on it. I'd very much like a version of this recipe that I can log into.