System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.PlayerItemAccessibilityUtility.CacheAccessibleThings (int) <0x01726>
at RimWorld.PlayerItemAccessibilityUtility.Accessible (Verse.ThingDef,int,Verse.Map) <0x00042>
at RimWorld.PlayerItemAccessibilityUtility.PossiblyAccessible (Verse.ThingDef,int,Verse.Map) <0x00044>
at MoreEvents.Patch.IncidentWorker_QuestTradeRequest/<>c__DisplayClass10_0.<TryFindRandomRequestedThingDef>b__0 (Verse.ThingDef) <0x001bb>
at MoreEvents.Patch.IncidentWorker_QuestTradeRequest/<>c__DisplayClass10_0.<TryFindRandomRequestedThingDef>b__1 (Verse.ThingDef) <0x00027>
at System.Linq.Enumerable/<CreateWhereIterator>c__Iterator1D`1<Verse.ThingDef>.MoveNext () <0x0016b>
at System.Collections.Generic.List`1<Verse.ThingDef>.AddEnumerable (System.Collections.Generic.IEnumerable`1<Verse.ThingDef>) <0x000d7>
at System.Collections.Generic.List`1<Verse.ThingDef>..ctor (System.Collections.Generic.IEnumerable`1<Verse.ThingDef>) <0x000e5>
at System.Linq.Enumerable.ToList<Verse.ThingDef> (System.Collections.Generic.IEnumerable`1<Verse.ThingDef>) <0x00070>
at Verse.GenCollection.TryRandomElement<Verse.ThingDef> (System.Collections.Generic.IEnumerable`1<Verse.ThingDef>,Verse.ThingDef&) <0x000df>
at MoreEvents.Patch.IncidentWorker_QuestTradeRequest.TryFindRandomRequestedThingDef (Verse.Map,Verse.ThingDef&,int&) <0x00160>
at MoreEvents.Patch.IncidentWorker_QuestTradeRequest.TryGenerateTradeRequest (RimWorld.Planet.TradeRequestComp,Verse.Map) <0x00095>
at MoreEvents.Patch.IncidentWorker_QuestTradeRequest.TryExecuteWorker (RimWorld.IncidentParms) <0x000e1>
at (wrapper dynamic-method) RimWorld.IncidentWorker.TryExecute_Patch1 (object,RimWorld.IncidentParms) <0x0005c>
at RimWorld.Storyteller.TryFire (RimWorld.FiringIncident) <0x0008e>
at (wrapper dynamic-method) RimWorld.IncidentQueue.IncidentQueueTick_Patch1 (object) <0x000d4>
at RimWorld.Storyteller.StorytellerTick () <0x0002f>
at Verse.TickManager.DoSingleTick () <0x00610>

Verse.Log:Error(String, Boolean)
Verse.TickManager:DoSingleTick()
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()