Well whatever the reason, as usual, the "official" reason simply doesn't add up. Like with the closure of the book study, and so much else.
Gilead wasn't considered important enough in recent years to even warrant mention in the yearbooks. And previous annual meetings have been posted and translated with no fuss. Only this year it causes a problem. Why?
I think they've completely run out of money and/or have got some serious crisis going on at headquarters.
By the way the 143rd class of Gilead had 48 students. Every single one was sent back to the country they came from as their "assignment". Not a single new missionary was created, nor has been for the last 7 years apparently. They couldn't afford to keep producing missionaries. Because Watchtower has been running out of money for a decade or more. Now it looks like they're completely broke.