i load my save then this happened:

Could not instantiate or initialize a WorldObjectComp: System.NullReferenceException: Object reference not set to an instance of an object
at VFESecurity.ArtilleryComp.Initialize (RimWorld.WorldObjectCompProperties props) [0x00006] in <e4bce688bcaf499d9805cdfadd5978f3>:0
at RimWorld.Planet.WorldObject.InitializeComps () [0x0004c] in <7b345446a85d4ed599f9c604ae61854b>:0
Verse.Log:Error(String, Boolean)
RimWorld.Planet.WorldObject:InitializeComps()
RimWorld.Planet.WorldObject:ExposeData()
RimWorld.Planet.MapParent:ExposeData()
RimWorld.Planet.Settlement:ExposeData()
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Collections:Look(List`1&, Boolean, String, LookMode, Object[])
Verse.Scribe_Collections:Look(List`1&, String, LookMode, Object[])
aRandomKiwi.MFM.GC_MFM:ExposeData()
Verse.ScribeExtractor:SaveableFromNode(XmlNode, Object[])
Verse.Scribe_Collections:Look(List`1&, Boolean, String, LookMode, Object[])
Verse.Scribe_Collections:Look(List`1&, String, LookMode, Object[])
Verse.Game:ExposeSmallComponents()
Verse.Game:Verse.Game.LoadGame_Patch5(Game)
Verse.SavedGameLoaderNow:Verse.SavedGameLoaderNow.LoadGameFromSaveFileNow_Patch1(String)
Verse.<>c:<Start>b__1_1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object)
System.Threading.ThreadHelper:ThreadStart()