I have the problem since a long time, I'm playing on a modded 1.11.1 install and everytime I go into the VAB and launch it works, or if I go into the tracking station it works, but if I want to launch a second time or go out of the tracking station and go into another building it doesn't work and I'm getting a NullReferenceException. I only have this problem in this modpack, I have never encountered it anywhere else.
question: is the error message here sufficient for the locationing of the problem?