rw error log

Exception filling window for RimWorld.Page_SelectScenario: System.NullReferenceException: Object reference not set to an instance of an object
[Ref C5ACED5C]
  at Verse.GenTypes.SameOrSubclassOf (System.Type baseType, System.Type parentType) [0x00009] in <46372f5dadbf4af8939e608076251180>:0
  at Verse.GenTypes.SameOrSubclassOf[T] (System.Type baseType) [0x00000] in <46372f5dadbf4af8939e608076251180>:0
  at RimWorld.ReadingPolicyDatabase.GenerateStartingPolicies () [0x0003e] in <46372f5dadbf4af8939e608076251180>:0
RimWorld.ReadingPolicyDatabase..ctor()
Verse.Game..ctor()
  at RimWorld.Page_SelectScenario.BeginScenarioConfiguration (RimWorld.Scenario scen, RimWorld.Page originPage) [0x00005] in <46372f5dadbf4af8939e608076251180>:0
  at RimWorld.Page_SelectScenario.CanDoNext () [0x00014] in <46372f5dadbf4af8939e608076251180>:0
  at RimWorld.Page.DoBottomButtons (UnityEngine.Rect rect, System.String nextLabel, System.String midLabel, System.Action midAct, System.Boolean showNext, System.Boolean doNextOnKeypress) [0x000f2] in <46372f5dadbf4af8939e608076251180>:0
  at RimWorld.Page_SelectScenario.DoWindowContents (UnityEngine.Rect rect) [0x000ab] in <46372f5dadbf4af8939e608076251180>:0
  at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001a6] in <46372f5dadbf4af8939e608076251180>:0
[Harmony, 0Harmony.dll] MonoMod.Utils.DynamicMethodDefinition.UnityEngine.StackTraceUtility.ExtractStackTrace_Patch1()
[Harmony, 0Harmony.dll] MonoMod.Utils.DynamicMethodDefinition.Verse.Log.Error_Patch3(System.String)
[Core, Assembly-CSharp.dll] Verse.Window.InnerWindowOnGUI(System.Int32 x)
[System, UnityEngine.IMGUIModule.dll] UnityEngine.GUI.CallWindowDelegate(UnityEngine.GUI+WindowFunction func, System.Int32 id, System.Int32 instanceID, UnityEngine.GUISkin _skin, System.Int32 forceRect, System.Single width, System.Single height, UnityEngine.GUIStyle style)