Sudden crash

I have this issue which causes crash of the game. From the report it has something to do with Electrobanks. Im using a sweeper to load Electrobanks with empty batteries.

Exception in: (ElectrobankCharger).ElectrobankCharger.root.full.Enter 
System.NullReferenceException: Object reference not set to an instance of an object
  at Electrobank.Replace (UnityEngine.GameObject electrobank, Tag replacement, System.Boolean dropFromStorage) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at Electrobank.ReplaceEmptyWithCharged (UnityEngine.GameObject EmptyElectrobank, System.Boolean dropFromStorage) [0x0000b] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at ElectrobankCharger+Instance.TransferChargeToElectrobank () [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at ElectrobankCharger+<>c.<InitializeStates>b__7_8 (ElectrobankCharger+Instance smi) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>: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 <e38eee7ad0c442f9b029e92b023f29e8>:0 

  at UnityEngine.Logger.Log (UnityEngine.LogType logType, System.Object message, UnityEngine.Object context) [0x00000] in <c39a522eee05469b8171a6cfeb646c59>:0 
  at UnityEngine.Debug.LogError (System.Object message, UnityEngine.Object context) [0x00000] in <c39a522eee05469b8171a6cfeb646c59>:0 
  at Debug.LogError (System.Object obj, UnityEngine.Object context) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at DebugUtil.LogErrorArgs (UnityEngine.Object context, System.Object[] objs) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at DebugUtil.LogException (UnityEngine.Object context, System.String errorMessage, System.Exception e) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>: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 <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].PushState (StateMachine+BaseState state) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].GoTo (StateMachine+BaseState base_state) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at StateMachine`4+Parameter`1+Transition[StateMachineType,StateMachineInstanceType,MasterType,DefType,ParameterType].Evaluate (StateMachine+Instance smi) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at StateMachine`4+Parameter`1+Context[StateMachineType,StateMachineInstanceType,MasterType,DefType,ParameterType].Set (ParameterType value, StateMachineInstanceType smi, System.Boolean silenceEvents) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at StateMachine`4+Parameter`1[StateMachineType,StateMachineInstanceType,MasterType,DefType,ParameterType].Set (ParameterType value, StateMachineInstanceType smi, System.Boolean silenceEvents) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at StateMachine`4+FloatParameter[StateMachineType,StateMachineInstanceType,MasterType,DefType].Delta (System.Single delta_value, StateMachineInstanceType smi) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at ElectrobankCharger+Instance.ChargeInternal (ElectrobankCharger+Instance smi, System.Single dt) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at ElectrobankCharger+<>c.<InitializeStates>b__7_5 (ElectrobankCharger+Instance smi, System.Single dt) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at BucketUpdater`1[DataType].Update (DataType data, System.Single dt) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at UpdateBucketWithUpdater`1[DataType].Update (System.Single dt) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at StateMachineUpdater+BucketGroup.AdvanceOneSubTick (System.Single dt) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at StateMachineUpdater.AdvanceOneSimSubTick () [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at Game.SimEveryTick (System.Single dt) [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
  at Game.Update () [0x00000] in <e38eee7ad0c442f9b029e92b023f29e8>:0 
Build: U57-707956-SCRP