In order to fix things up today with the leaders, we have block the sale of them on the market (public/private/kate) temporary.
It should be allowed again tomorrow or maybe early.
It's ok..to at least keep things in order until UR arrives in a decision on what to do next or how to fix the recent complains on "leader issues" and people who encountered "leader bug" problems..
We are in the process of fixing the situation, if you have been affected by the bug (in a good or bad way), you'll receive a private message from kate explaining what actions have been taken on your account.