Trade bug, found temporary solution in debug menu but no long term solution...

[Matija]

I can't trade with incoming caravans, my trader just comes up to them and stands there and goes back to his job.

This is the log:

JobDriver threw exception in initAction. Pawn=Géradon, Job=TradeWithPawn A=Thing_Human239357, Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at RimWorld.TransferableUtility.TransferAsOne (Verse.Thing a, Verse.Thing b) [0x00000] in <filename unknown>:0
  at RimWorld.TransferableUtility.TransferableMatching[Tradeable] (Verse.Thing thing, System.Collections.Generic.List`1 transferables) [0x00000] in <filename unknown>:0
  at RimWorld.TradeDeal.AddToTradeables (Verse.Thing t, Transactor trans) [0x00000] in <filename unknown>:0
  at RimWorld.TradeDeal.AddAllTradeables () [0x00000] in <filename unknown>:0
  at RimWorld.TradeDeal.Reset () [0x00000] in <filename unknown>:0
  at RimWorld.TradeDeal..ctor () [0x00000] in <filename unknown>:0
  at RimWorld.TradeSession.SetupWith (ITrader newTrader, Verse.Pawn newPlayerNegotiator) [0x00000] in <filename unknown>:0
  at RimWorld.Dialog_Trade..ctor (Verse.Pawn playerNegotiator, ITrader trader) [0x00000] in <filename unknown>:0
  at RimWorld.JobDriver_TradeWithPawn+<MakeNewToils>c__Iterator3F.<>m__B6 () [0x00000] in <filename unknown>:0
  at Verse.AI.JobDriver.TryActuallyStartNextToil () [0x00000] in <filename unknown>:0  lastJobGiver=, curJob.def=TradeWithPawn, curDriver=RimWorld.JobDriver_TradeWithPawn
Verse.Log:Error(String)
Verse.AI.Pawn_JobTracker:StartErrorRecoverJob(String)
Verse.AI.JobDriver:TryActuallyStartNextToil()
Verse.AI.JobDriver:ReadyForNextToil()
Verse.AI.JobDriver:Notify_PatherArrived()
Verse.AI.Pawn_PathFollower:PatherArrived()
Verse.AI.Pawn_PathFollower:TryEnterNextPathCell()
Verse.AI.Pawn_PathFollower:PatherTick()
Verse.Pawn:Tick()
Verse.TickList:Tick()
Verse.TickManager:DoSingleTick()
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()

I used the debug menu to destroy some things on the map until I found the perpetrator, which was my storage building. After using the tool Destroy 21x21 on one of my storage in which I had nothing in but wood and a trade beacon, the roof collapsed and I could trade again.

This is a very strange occurrence and I have no idea what the issue is.

These are the mods I am using, but I think the Misc robot mods might be at fault:

HugsLib
Misc. Core
Better Coolers
Better Vents
BigBatterys
CE
CE Guns
Dubs Bad Hygiene
Everyone can do anything
ExtendedFabrics
ExtendedStorage
Hospitality
Industrialization
MapReRoll
Colony Leadership
Organ Thoughts
ReclaimFabric
RecolorStockpiles
Fertile Fields
RimFridge
Rimsenal
Rimsenal security
Rimsenal vanilla
Rimworld industrial roller