Game closes without crash report upon loading a vessel (1.6.1, RSS/RO, LOGS INCLUDED)

[BadModder54]

(Pretty much) everything in this install was fine before I designed my knockoff Saturn V rocket to reach the Moon and land with a crew. Upon wishing to test said rocket, I discovered that the game would close without explanation after pressing the "Launch" button in the VAB. I did find a very strange error after rooting around in my logs however, that being:

--------------------------------------------------------------------------------------------------------------------------------- EXC 15:41:24.031] NullReferenceException: Object reference not set to an instance of an object PartJoint.SetupJoint (Vector3 jointPos, Vector3 jointOrt, Vector3 jointOrt2, Int32 size) PartJoint.create (.Part child, .Part parent, UnityEngine.Transform nodeSpace, Vector3 nodePos, Vector3 nodeOrt, Vector3 nodeOrt2, Int32 nodeSize, AttachModes mode, Boolean rigid) PartJoint.Create (.Part owner, .Part parent, .AttachNode nodeToParent, .AttachNode nodeFromParent, AttachModes mode) Part.SecureAutoStrut (.Part anchor) Part+<SecureAutoStruts>c__Iterator3.MoveNext () UnityEngine.SetupCoroutine.InvokeMoveNext (IEnumerator enumerator, IntPtr returnValueAddress) ---------------------------------------------------------------------------------------------------------------------------------

Here is the output log: https://www.dropbox.com/s/4edqfucu5b9ax3b/output_log.txt?dl=0

and KSP log: https://www.dropbox.com/s/7kghylxc4c43cim/KSP.log?dl=0