Last summer I started working on my first Challenge, without knowing that publication of such GeoCaches were suspended. The reviewer told me in October when I pushed the "Submit for Review"-button, giving me the links telling the whole story. So I waited for April 2016 to come. Now he says, I needed a Challenge-Checker before submitting. It seems, there are still major problems to solve.
But I'm patiently waiting, the more time lapses, the more people will finally fulfill the criteria of the challenge.