Can you elaborate? Did you have two Kopernicus versions installed at the same time? I have been trying to use KSP 1.1.3 with the most up to date Kopernicus, Galactic Neighborhood and several planet packs; but I have, like you, been getting dark planets. Kerbin, Duna, Laythe and Jool all go black. Strangely Eve is sometimes immune which confuses me as all the affected planets/moons are ones with cloud layers. Googling scatterer or kopernicus with 'black planet' or similar gets me nothing. The exact same game with kopernicus but no galactic content works fine too.