This crash is 100% reproducible with the attached save file in its current state. I reproduced it several times and also tried deconstructing and rebuilding the rocket control station with no luck. Disabled plugins and still get it.
[09:05:31.844]  [ERROR] RocketControlStationComplete Exception in: (RocketControlStation).WorkChore`1+States[[RocketControlStationLaunchWorkable, Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]].root.work.
System.NullReferenceException: Object reference not set to an instance of an object
- Load the save file
- select rocket S.S. spaceship XC (the only petroleum rocket)
- click launch