Crash on loading a save

Exception in: (RailGunPayload).RailGunPayload.root.travel.transferWorlds.
System.NullReferenceException: Object reference not set to an instance of an object
  at RailGunPayload+StatesInstance.StartLand () [0x00031] in <cb20703507b14eea8088dbc44abf7f85>:0
  at RailGunPayload+<>c.<InitializeStates>b__13_10 (RailGunPayload+StatesInstance smi) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].ExecuteActions (StateMachine`4+State[StateMachineType,StateMachineInstanceType,MasterType,DefType] state, System.Collections.Generic.List`1[T] actions) [0x00048] in <cb20703507b14eea8088dbc44abf7f85>:0

  at UnityEngine.Debug.LogError (System.Object message, UnityEngine.Object context) [0x00000] in <72b60a3dd8cd4f12a155b761a1af9144>:0
  at Debug.LogError (System.Object obj, UnityEngine.Object context) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at DebugUtil.LogErrorArgs (UnityEngine.Object context, System.Object[] objs) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at DebugUtil.LogException (UnityEngine.Object context, System.String errorMessage, System.Exception e) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].ExecuteActions (StateMachine`4+State[StateMachineType,StateMachineInstanceType,MasterType,DefType] state, System.Collections.Generic.List`1[T] actions) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].PushState (StateMachine+BaseState state) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].GoTo (StateMachine+BaseState base_state) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachineSerializer+Entry.Restore (StateMachine+Instance smi) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachineSerializer.Restore (StateMachine+Instance instance) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachineController.Restore (StateMachine+Instance smi) [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachine+Instance.StartSM () [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].StartSM () [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at StateMachineController.StartSMIS () [0x00000] in <cb20703507b14eea8088dbc44abf7f85>:0
  at KPrefabID.OnSpawn () [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at KMonoBehaviour.Spawn () [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at Util.SpawnComponent (UnityEngine.Component cmp) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at MyAttributeManager`1[T].OnStart (System.Object obj, KMonoBehaviour cmp) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at MyAttributes.OnStart (System.Object obj, KMonoBehaviour cmp) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at MyAttributes.OnStart (KMonoBehaviour c) [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at KMonoBehaviour.Spawn () [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
  at KMonoBehaviour.Start () [0x00000] in <1b5c2ff4f53d4a48b7159ed84d905978>:0
Build: U43-526233-S