System.NullReferenceException: Object reference not set to an instance of an object
  at RimWorld.RoomRoleWorker_Kitchen.GetScore (Verse.Room room) [0x00060] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.Room.<UpdateRoomStatsAndRole>b__90_0 (Verse.RoomRoleDef x) [0x00006] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.GenCollection.MaxBy[TSource,TKey] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] selector, System.Collections.Generic.IComparer`1[T] comparer) [0x0005c] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.GenCollection.MaxBy[TSource,TKey] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] selector) [0x00007] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.Room.UpdateRoomStatsAndRole () [0x000ad] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.Room.get_Role () [0x00008] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.Gizmo_RoomStats.<GetRoomToShowStatsFor>g__IsValid|8_0 (Verse.Room r) [0x0000b] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.Gizmo_RoomStats.GetRoomToShowStatsFor (Verse.Building building) [0x000b1] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at Verse.Building+<GetGizmos>d__17.MoveNext () [0x000d8] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
  at System.Collections.Generic.List`1[T].InsertRange (System.Int32 index, System.Collections.Generic.IEnumerable`1[T] collection) [0x000db] in <567df3e0919241ba98db88bec4c6696f>:0
  at System.Collections.Generic.List`1[T].AddRange (System.Collections.Generic.IEnumerable`1[T] collection) [0x00000] in <567df3e0919241ba98db88bec4c6696f>:0
  at RimWorld.InspectGizmoGrid.DrawInspectGizmoGridFor (System.Collections.Generic.IEnumerable`1[T] selectedObjects, Verse.Gizmo& mouseoverGizmo) [0x00045] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
Verse.Log:Error(String, Boolean)
Verse.Log:ErrorOnce(String, Int32, Boolean)
RimWorld.InspectGizmoGrid:DrawInspectGizmoGridFor(IEnumerable`1, Gizmo&)
RimWorld.MainTabWindow_Inspect:DrawInspectGizmos()
RimWorld.InspectPaneUtility:ExtraOnGUI(IInspectPane)
RimWorld.MainTabWindow_Inspect:ExtraOnGUI()
Verse.WindowStack:WindowStackOnGUI()
RimWorld.UIRoot_Play:UIRootOnGUI()
Verse.Root:DMD<DMD<OnGUI_Patch1>?734748416::OnGUI_Patch1>(Root)

Word wrap was false at end of frame.
Verse.Log:Error(String, Boolean)
Verse.Log:ErrorOnce(String, Int32, Boolean)
Verse.Text:StartOfOnGUI()
Verse.UIRoot:DMD<DMD<UIRootOnGUI_Patch1>?-816712448::UIRootOnGUI_Patch1>(UIRoot)
RimWorld.UIRoot_Play:UIRootOnGUI()
Verse.Root:DMD<DMD<OnGUI_Patch1>?734748416::OnGUI_Patch1>(Root)