Hmm, is that NASSP addon installed on Orbter 2016?
Stay to be corrected, but perhaps NASSP adds new tiles at KSC which conflict with 2016 earth terrain & textures..
So try to uninstall this one and install it again without those tiles
Hmm, in that case, maybe it's missing the Orbiter 2016 Earth textures? They are included in the standard Orbiter 2016 release, but not in the Orbiter Beta, I think.
Yeah, you can simply reinstall earth hires textures and mesh and see if it helps.
If doesnt, then try to install a clean copy of Orbiter, earth hi res textures and install NASSP manually excluding its earth tiles/textures