Exception from asynchronous event: System.NullReferenceException: Object reference not set to an instance of an object
at Verse.ResearchProjectDef+<>c.<get_UnlockedDefs>b__67_2 (Verse.Def x) [0x00000] in <95de19971c5d40878d8742747904cdcd>:0
at System.Linq.EnumerableSorter`2[TElement,TKey].ComputeKeys (TElement[] elements, System.Int32 count) [0x00010] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.EnumerableSorter`1[TElement].ComputeMap (TElement[] elements, System.Int32 count) [0x00000] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.EnumerableSorter`1[TElement].Sort (TElement[] elements, System.Int32 count) [0x00000] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.OrderedEnumerable`1[TElement].SortedMap (System.Linq.Buffer`1[TElement] buffer) [0x00006] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.OrderedEnumerable`1+<GetEnumerator>d__3[TElement].MoveNext () [0x0003d] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.Enumerable+ConcatIterator`1[TSource].MoveNext () [0x0002b] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.Set`1[TElement].UnionWith (System.Collections.Generic.IEnumerable`1[T] other) [0x00018] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.Enumerable+DistinctIterator`1[TSource].FillSet () [0x0000b] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.Enumerable+DistinctIterator`1[TSource].ToList () [0x00000] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.Enumerable.ToList[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0001f] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at Verse.ResearchProjectDef.get_UnlockedDefs () [0x0016b] in <95de19971c5d40878d8742747904cdcd>:0
at (wrapper dynamic-method) RimWorld.ResearchManager.RimWorld.ResearchManager.FinishProject_Patch3(RimWorld.ResearchManager,Verse.ResearchProjectDef,bool,Verse.Pawn,bool)
at RimWorld.ScenPart_StartingResearch.PostGameStart () [0x0000d] in <95de19971c5d40878d8742747904cdcd>:0
at RimWorld.Scenario.PostGameStart () [0x00014] in <95de19971c5d40878d8742747904cdcd>:0
at (wrapper dynamic-method) Verse.Game.Verse.Game.InitNewGame_Patch1(Verse.Game)
at Verse.Root_Play+<>c.<Start>b__1_2 () [0x00011] in <95de19971c5d40878d8742747904cdcd>:0
at Verse.LongEventHandler.RunEventFromAnotherThread (System.Action action) [0x00008] in <95de19971c5d40878d8742747904cdcd>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
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 ()