UG report maybe:

I tried to force "Clean this room" and got the following error message:
"Achtung found that some other mod(s) caused the following error: ArgumentNullExeption. Possible mods in order of likeliness: Do your F*** reasearch, Children school and leaning, Vanilla expanded Framework, Giddy up ride and roll, [KV] Force Do Job. Select to copy annotated stacktrace to clipboard"


If this is not something that is part of your realm I apologize
and If you need further information a save or anything
just reply


stacktrace:
Exception in RimWorld.FloatMenuMakerMap.ChoicesAtFor: System.ArgumentNullException: Value cannot be null.
Parameter name: type
at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00003] in <eae584ce26bc40229c1b1aa476bfa589>:0
at System.Activator.CreateInstance (System.Type type) [0x00000] in <eae584ce26bc40229c1b1aa476bfa589>:0
at RimWorld.WorkGiverDef.get_Worker () [0x00008] in <e13bd2f1929544099ed2b58e66ece833>:0
at RimWorld.FloatMenuMakerMap.AddJobGiverWorkOrders (UnityEngine.Vector3 clickPos, Verse.Pawn pawn, System.Collections.Generic.List`1[T] opts, System.Boolean drafted) [0x000fe] in <e13bd2f1929544099ed2b58e66ece833>:0
- transpiler CM_Prioritize_Research: IEnumerable`1 CM_Prioritize_Research.FloatMenuMakerMap_Patches+FloatMenuMakerMap_AddJobGiverWorkOrders:Transpiler(IEnumerable`1 instructions)
- transpiler net.pardeike.rimworld.mods.achtung: IEnumerable`1 AchtungMod.FloatMenuMakerMap_AddJobGiverWorkOrders_Patch:Transpiler(IEnumerable`1 instructions, MethodBase original)
- prefix net.pardeike.rimworld.mods.achtung: Void AchtungMod.FloatMenuMakerMap_AddJobGiverWorkOrders_Patch:Prefix(Pawn pawn, ForcedWork& __state)
- postfix net.pardeike.rimworld.mods.achtung: Void AchtungMod.FloatMenuMakerMap_AddJobGiverWorkOrders_Patch:Postfix(Pawn pawn, ForcedWork __state)
at RimWorld.FloatMenuMakerMap.AddUndraftedOrders (UnityEngine.Vector3 clickPos, Verse.Pawn pawn, System.Collections.Generic.List`1[T] opts) [0x000d9] in <e13bd2f1929544099ed2b58e66ece833>:0
- prefix OskarPotocki.VFECore: Boolean AnimalBehaviours.VanillaExpandedFramework_FloatMenuMakerMap_AddUndraftedOrders_Patch:AvoidGeneralErrorIfPawnIsAnimal(Pawn pawn)
- postfix Children: Void Children.ChildrenHarmony+FloatMenuMakerMap_Patch:AddUndraftedOrders_Post(Vector3 clickPos, Pawn pawn, List`1 opts)
at RimWorld.FloatMenuMakerMap.ChoicesAtFor (UnityEngine.Vector3 clickPos, Verse.Pawn pawn, System.Boolean suppressAutoTakeableGoto) [0x00112] in <e13bd2f1929544099ed2b58e66ece833>:0
- prefix com.forcedojob.rimworld.mod: Void ForceDoJob.Patch_FloatMenuMakerMap_ChoicesAtFor:Prefix(Pawn pawn)
- postfix com.forcedojob.rimworld.mod: Void ForceDoJob.Patch_FloatMenuMakerMap_ChoicesAtFor:Postfix(Pawn pawn)
- postfix net.pardeike.rimworld.mods.achtung: Void AchtungMod.FloatMenuMakerMap_ChoicesAtFor_Postfix:Postfix(List`1 __result, Vector3 clickPos, Pawn pawn)
- postfix roolo.giddyuprideandroll: Void GiddyUpRideAndRoll.Harmony.FloatMenuMakerMap_ChoicesAtFor:Postfix(Vector3 clickPos, Pawn pawn, List`1& __result)
- finalizer net.pardeike.rimworld.mods.achtung: Exception AchtungMod.FloatMenuMakerMap_ChoicesAtFor_Finalizer:Finalizer(Exception __exception, List`1& __result)