Error in GenStep: System.InvalidCastException: Specified cast is not valid.
  at (wrapper dynamic-method) SRTS.HarmonyTest.SRTS.HarmonyTest.Prefix_Patch0(Verse.IntVec3,Verse.Map,RimWorld.ActiveDropPodInfo)
  at (wrapper dynamic-method) RimWorld.DropPodUtility.RimWorld.DropPodUtility.MakeDropPodAt_Patch1(Verse.IntVec3,Verse.Map,RimWorld.ActiveDropPodInfo)
  at RimWorld.DropPodUtility.DropThingGroupsNear (Verse.IntVec3 dropCenter, Verse.Map map, System.Collections.Generic.List`1[T] thingsGroups, System.Int32 openDelay, System.Boolean instaDrop, System.Boolean leaveSlag, System.Boolean canRoofPunch, System.Boolean forbid, System.Boolean allowFogged, System.Boolean canTransfer) [0x00197] in <cdbd0ed5089a418da09b9a259f9dbd8f>:0
  at RimWorld.ScenPart_PlayerPawnsArriveMethod.GenerateIntoMap (Verse.Map map) [0x00118] in <cdbd0ed5089a418da09b9a259f9dbd8f>:0
  at RimWorld.Scenario.GenerateIntoMap (Verse.Map map) [0x00014] in <cdbd0ed5089a418da09b9a259f9dbd8f>:0
  at RimWorld.GenStep_ScenParts.Generate (Verse.Map map, Verse.GenStepParams parms) [0x00005] in <cdbd0ed5089a418da09b9a259f9dbd8f>:0
  at Verse.MapGenerator.GenerateContentsIntoMap (System.Collections.Generic.IEnumerable`1[T] genStepDefs, Verse.Map map, System.Int32 seed) [0x000d2] in <cdbd0ed5089a418da09b9a259f9dbd8f>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch4 (string)
Verse.MapGenerator:GenerateContentsIntoMap (System.Collections.Generic.IEnumerable`1<Verse.GenStepWithParams>,Verse.Map,int)
(wrapper dynamic-method) Verse.MapGenerator:Verse.MapGenerator.GenerateMap_Patch2 (Verse.IntVec3,RimWorld.Planet.MapParent,Verse.MapGeneratorDef,System.Collections.Generic.IEnumerable`1<Verse.GenStepWithParams>,System.Action`1<Verse.Map>)
(wrapper dynamic-method) Verse.Game:Verse.Game.InitNewGame_Patch6 (Verse.Game)
Verse.Root_Play/<>c:<Start>b__1_2 ()
Verse.LongEventHandler:RunEventFromAnotherThread (System.Action)
Verse.LongEventHandler/<>c:<UpdateCurrentAsynchronousEvent>b__27_0 ()
System.Threading.ThreadHelper:ThreadStart_Context (object)
System.Threading.ExecutionContext:RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()