Exception in Tick (pawn=Sammy, job=FinishFrame (Job_41298) A=Thing_MilitaryFootlocker_Frame128595, CurToil=1): System.ArgumentNullException: Argument cannot be null.
Parameter name: type
at System.Activator.CheckType (System.Type) <0x0005d>
at System.Activator.CreateInstance (System.Type,bool) <0x00013>
at System.Activator.CreateInstance (System.Type) <0x00012>
at Verse.ThingMaker.MakeThing (Verse.ThingDef,Verse.ThingDef) <0x00214>
at RimWorld.Frame.CompleteConstruction (Verse.Pawn) <0x002f3>
at RimWorld.JobDriver_ConstructFinishFrame/<MakeNewToils>c__Iterator0/<MakeNewToils>c__AnonStorey1.<>m__1 () <0x001ef>
at (wrapper dynamic-method) Verse.AI.JobDriver.DriverTick_Patch1 (object) <0x00309>
 lastJobGiver=RimWorld.JobGiver_Work, curJob.def=FinishFrame, curDriver=QualityBuilder._JobDriver_ConstructFinishFrame
Verse.Log:Error(String)
Verse.AI.Pawn_JobTracker:StartErrorRecoverJob(String)
Verse.AI.JobDriver:DriverTick_Patch1(Object)
Verse.AI.Pawn_JobTracker:JobTrackerTick()
Verse.Pawn:Tick_Patch1(Object)
Verse.TickList:Tick()
Verse.TickManager:DoSingleTick()
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()