research tab.

tab. Whenever this happens, I also get this error in the debug log:

Exception filling window for RimWorld.MainTabWindow_Research: System.NullReferenceException: Object reference not set to an instance
of an object
at Verse.ResearchProjectDef+<>c.<get_UnlockedDefs>b__57_2 (Verse.Def x) [0x00000] in <99518a644a3e4a7ea3fde566568df84a>:0
at System.Linq.EnumerableSorter`2[TElement,TKey].ComputeKeys

this is popping up
Exception filling window for RimWorld.MainTabWindow_Research: System.NullReferenceException: Object reference not set to an instance of an object
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 <351e49e2a5bf4fd

Exception filling window for RimWorld.MainTabWindow_Research: System.NullReferenceException: Object reference not set to an instance of an object
at Verse.ResearchProjectDef+<>c.<get_UnlockedDefs>b
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 <351e49e2a5bf4fd

All my entities turned invisible in the middle of the game. Any one know why?

Exception drawing 'HoldingPlatform67519' at cell (157, 0, 128):
System.NullReferenceException: Object reference not set
to an instance of an object
[Ref D834447]
at VFECore.PawnDataCache.GetPawnDataCache (Verse.Pawn pawn, System.Boolean forceRefresh, System.Boolean canRefresh) [0x00001] in <a1527e1dca564672a546250eb15c

My pawns are standing, thera are making literally nothing. There is a log:

Exception ticking Nikola (at (114, 0, 101)): System.NullReferenceException: Object reference not set to an instance of an
631ae77b5d8>:0
at Verse.ThingFilter.Allows (Verse.Thing t) [0x000a1] in <360933dd75ad47e8a6d2a631ae77b5d8>:0
at RimWorld.StorageSettings.AllowedToAccept (Verse.Thing t) [0x00000] in <360933dd75ad

) driver.job=(TradeWithPawn (Job_848903) A=Thing_Human112561)
System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.TransferableUtility.CanStackTogether (Verse.Thing thing
error log is attached and i cant get a clue on how to solve this

JobDriver threw exception in toil MakeNewToils's initAction for pawn Roy driver=JobDriver_TradeWithPawn (toilIndex=1

)): System.NullReferenceException: Object reference not set to an instance of an object
[Ref 55CF7B3E]
at VSE.ModCompat.get_SaturatedXPMultiplier () [0x00000] in <01a0c5deb2f94ffeaefc22069c727ab1>:0
at
MVCF.PatchSets.PatchSet_VerbComps:TryCastNextBurstShot_Transpiler(IEnumerable`1 instructions, ILGenerator generator)
- POSTFIX legodude17.mvcf: Void MVCF.PatchSets.PatchSet_VerbComps:TryCastNextBurstShot_Postfix(Verb __instance)
at Verse.Verb.VerbTick () [0x00056] in

)
System.Threading.ThreadHelper:ThreadStart ()

Could not do PostLoadInit on RimWorld.Pawn_TrainingTracker: System.NullReferenceException: Object reference not set to an instance of an object
at
()
Verse.Game:UpdatePlay ()
Verse.Root_Play:Update ()


Exception ticking Matthew (at (154, 0, 123)): System.NullReferenceException: Object reference not set to an instance of an object
at Verse.Thing.get_Smeltable () [0x

])
System.NullReferenceException: Object reference not set to an instance of an object
[Ref ED6EAE30]
at VSE.ModCompat.get_SaturatedXPMultiplier () [0x00000] in <01a0c5deb2f94ffeaefc22069c727ab1>:0
at
VSE.Passions.PassionPatches.LearnRateFactor_Prefix (System.Boolean direct, RimWorld.SkillRecord __instance, System.Single& __result) [0x0006a] in <01a0c5deb2f94ffeaefc22069c727ab1>:0
at RimWorld.SkillRecord.LearnRateFactor (System.Boolean direct