I got this error log:

Exception ticking PRF_SelfCookerII42938 (at (118, 0, 158)): System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: key
at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <567df3e0919241ba98db88bec4c6696f>:0
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00000] in <567df3e0919241ba98db88bec4c6696f>:0
at VarietyMatters.VarietyRecord.GetVarietyRecord (Verse.Pawn trackedPawn) [0x00001] in <328bb922cab6496f8c439dcdc216ad22>:0
at VarietyMatters.VarietyCooking.BestVarietyInSet (System.Boolean& __result, System.Collections.Generic.List`1[T] availableThings, RimWorld.Bill bill, System.Collections.Generic.List`1[T] chosen, Verse.IntVec3 rootCell, System.Boolean& alreadySorted) [0x0005e] in <328bb922cab6496f8c439dcdc216ad22>:0
at (wrapper dynamic-method) RimWorld.WorkGiver_DoBill.RimWorld.WorkGiver_DoBill.TryFindBestBillIngredientsInSet_Patch1(System.Collections.Generic.List`1<Verse.Thing>,RimWorld.Bill,System.Collections.Generic.List`1<Verse.ThingCount>,Verse.IntVec3,bool)
at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00032] in <567df3e0919241ba98db88bec4c6696f>:0
--- End of inner exception stack trace ---
at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00048] in <567df3e0919241ba98db88bec4c6696f>:0
at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <567df3e0919241ba98db88bec4c6696f>:0
at ProjectRimFactory.SAL3.Things.Assemblers.Building_ProgrammableAssembler.TryFindBestBillIngredientsInSet (System.Collections.Generic.List`1[T] accessibleThings, RimWorld.Bill b, System.Collections.Generic.List`1[T] chosen) [0x00025] in <e33e119ff4ec4be5b705d9f16783d5d2>:0
at ProjectRimFactory.SAL3.Things.Assemblers.Building_ProgrammableAssembler.TryGetNextBill () [0x00074] in <e33e119ff4ec4be5b705d9f16783d5d2>:0
at ProjectRimFactory.SAL3.Things.Assemblers.Building_ProgrammableAssembler.Tick () [0x0016c] in <e33e119ff4ec4be5b705d9f16783d5d2>:0
at (wrapper dynamic-method) Verse.TickList.Verse.TickList.Tick_Patch2(Verse.TickList)
Verse.Log:Error(String, Boolean)
Verse.TickList:Verse.TickList.Tick_Patch2(TickList)
Verse.TickManager:Verse.TickManager.DoSingleTick_Patch2(TickManager)
Verse.TickManager:TickManagerUpdate()
Verse.Game:Verse.Game.UpdatePlay_Patch1(Game)
Verse.Root_Play:Update()

I play version 1.2.