PLEASE READ THIS:
About
Kopernicus is a KSP add-on that allows for modification of stock planets and the creation of new planets via modification of the system prefab. Why is this advantageous you might ask? Previous planet adder mods, such as Planet Factory, modified the live planetary system and had to keep multiple hacks actively running to provide these worlds. We strive to provide the least hacky solution by introducing planets into the game in the exact same manner Squad would.
I'm getting a TypeLoadException when running Kopernicus and Craft Manager together (to be more precise: the KatLib.dll from KXAPI causes this issue, which is a dependency of Craft Manager). No clue how this is connected but for testing purposes, I've installed just these mods + dependencies on KSP 1.6.1 and after removing one of them, the exception disappears. It doesn't matter which one got removed though.
It happens while the AddonLoader instantiates kopernicus, so I'll put this here.