And I'm getting an error message "There was a problem verifying you are not a robot. Please try again or refresh the page." (Trying again and/or refreshing the page doesn't resolve the problem.) I've also tried several different browsers in Private mode to avoid any possible issues with cookies.

In T348967#9431261, @dominic.mayers wrote:

This old wikipedia library url forOxford Academic still does not work, but you have another one, perhaps a new one, that does work.

I can now view the above-mentioned text (J.N. Williams) too. Maybe the problem has been resolved.

Yes, I'm getting error messages that "You do not currently have access to this chapter", even though it shows I'm signed in to Oxford Academic via the Wikipedia Library. :(

In this particular case, it was the Gerald Savory article, but it's happened before with other articles. The newly-edited version of the article displays correctly on my laptop immediately, but the WP Android App on my mobile device continues to display the old version until about 2 days later.