When attempting to edit a post from one of the review queues earlier today, it appeared that the "edit" link was non-responsive.
Opening the question outside of the review queue, revealed the following message:
This makes sense. I had already submitted a few edits, and had reached my max for the day.
However, this helpful warning message does not appear when clicking the "edit" link from the review queue screen. Instead, you can click "edit" all day, and nothing happens.