Compatibility issues with Kerbal Konstructs, I am opening an issue with them as well. Fresh install of the game, no other mods installed. Crash happens right after main loading screen, just before you get to main menu.

buildID64.txt
error.log
output_log.txt

Both mods were installed from fresh clones of their respective git repositories.

Git repository is not guaranteed to function, only beta and full releases are

Fair enough, installing from a zip has no issues.