Crash on load: related to rocket in flight

My save (and the most recent backups as well) is now crashing every time I load it. File attached, and error is shown below. I have a petroleum rocket in flight, heading to an empty tile on the edge of explored space.

I had a mod that may have been increasing the capacity of a solid oxidizer tank. But even with the mod disabled, the error keeps happening.

Exception in: (KeroseneEngineClusterComplete).RocketEngineCluster+States.GoTo(root.idle.grounded)
System.NullReferenceException: Object reference not set to an instance of an object
  at ClusterTraveler.RemainingTravelNodes () [0x00007] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at ConditionSufficientOxidizer.EvaluateCondition () [0x00068] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at CraftModuleInterface.EvaluateConditionSet (ProcessCondition+ProcessConditionType conditionType) [0x0001c] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at CraftModuleInterface.CheckPreppedForLaunch () [0x0000a] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at RocketEngineCluster+States.IsReadyToLaunch (RocketEngineCluster+StatesInstance smi) [0x0000e] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at GameStateMachine`4+EventTransitionData[StateMachineType,StateMachineInstanceType,MasterType,DefType].Evaluate (StateMachineInstanceType smi) [0x0000f] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].PushState (StateMachine+BaseState state) [0x002a6] in <6f302ab9df424a40a2c351069bb31b8e>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].GoTo (StateMachine+BaseState base_state) [0x0021e] in <6f302ab9df424a40a2c351069bb31b8e>:0

UnityEngine.Debug:LogError(Object, Object)
Debug:LogError(Object, Object)
DebugUtil:LogErrorArgs(Object, Object[])
GenericInstance:GoTo(BaseState)
Instance:StartSM()
GenericInstance:StartSM()
RocketEngineCluster:OnSpawn()
KMonoBehaviour:Spawn()
KMonoBehaviour:Start()

save Cycle 437.sav