U.S. Presidents not downloading – Encyclopædia Britannica Review

This is a fun app to download. It has a variety of stuff to read and learn about. However, when I tried to read an article about a U.S. President (e.g. Jefferson, Grant, Kennedy) it said “article downloading”. I waited for at least 5 minutes, but did not download. So is there some kind of technical issue? Perhaps some articles are updating?
Review by jv152309 on Encyclopædia Britannica.