I can’t find that box where you write your comments. Is it disabled or what?
You have to click through the “See all comments” link. It works fine for me. If you still have issues a screenshot of where you expect it to be would help troubleshoot.
i opened the page in firefox and it works. i see the white commenting box below the “add your comment” section. but in chrome, the box just isn’t there.
maybe some of the extensions in chrome interfere with something, a java script etc.