Error in WorldPawnGCTick(): System.NullReferenceException: Object reference not set to an instance of an object
at Verse.Map.get_ParentHolder () <0x0000c>
at Verse.ThingOwnerUtility.AnyParentIs<RimWorld.Planet.TravelingTransportPods> (Verse.Thing) <0x00087>
at (wrapper dynamic-method) RimWorld.PawnUtility.IsTravelingInTransportPodWorldObject_Patch2 (Verse.Pawn) <0x0001d>
at RimWorld.Planet.WorldPawnGC.GetCriticalPawnReason (Verse.Pawn) <0x000da>
at RimWorld.Planet.WorldPawnGC/<AccumulatePawnGCData>cIterator0.MoveNext () <0x000db>
at RimWorld.Planet.WorldPawnGC/<PawnGCPass>cIterator1.MoveNext () <0x0016b>
at RimWorld.Planet.WorldPawnGC.WorldPawnGCTick () <0x000d3>
at RimWorld.Planet.WorldPawns.WorldPawnsTick () <0x00260>

Verse.Log:Error(String)
RimWorld.Planet.WorldPawns:WorldPawnsTick()
RimWorld.Planet.World:WorldTick()
Verse.TickManager:DoSingleTick()
Verse.Game:<LoadGame>m__3()
Verse.LongEventHandler:ExecuteToExecuteWhenFinished()
Verse.LongEventHandler:UpdateCurrentAsynchronousEvent()
Verse.LongEventHandler:LongEventsUpdate(Boolean&)
Verse.Root:Update_Patch1(Object)
Verse.Root_Play:Update()