Worked yesterday, failing today without a change to my modlist so I suspect the cause to be a recently updated mod. I can load my save but I can't select objects or anything on the colonist bar. As soon as I hit play, the game crashes. Disabling this mod resolved the selection issue; however it still crashes as soon as I hit play. If you want the entire log, lmk how to deliver it.

Relevant bit form player.log:
Root level exception in OnGUI(): System.NullReferenceException: Object reference not set to an instance of an object
at OwlBar.Replace_ColonistOrCorpseAt.Prefix (UnityEngine.Vector2 pos, Verse.Thing& __result) [0x000bf] in <4ef16c6cb58e4d8b86033fa569a3603a>:0
at (wrapper dynamic-method) RimWorld.ColonistBar.RimWorld.ColonistBar.ColonistOrCorpseAt_Patch2(RimWorld.ColonistBar,UnityEngine.Vector2)
at RimWorld.Selector+<SelectableObjectsUnderMouse>d__40.MoveNext () [0x00031] in <8c412d4a16f94d4cb337e846f2dee469>:0
at System.Collections.Generic.List`1[T]..ctor (System.Collections.Generic.IEnumerable`1[T] collection) [0x00077] in <eae584ce26bc40229c1b1aa476bfa589>:0
at System.Linq.Enumerable.ToList[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x00018] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at RimWorld.Selector.SelectUnderMouse () [0x00026] in <8c412d4a16f94d4cb337e846f2dee469>:0
at (wrapper dynamic-method) RimWorld.Selector.RimWorld.Selector.HandleMapClicks_Patch2(RimWorld.Selector)
at RimWorld.Selector.SelectorOnGUI () [0x00000] in <8c412d4a16f94d4cb337e846f2dee469>:0
at RimWorld.MapInterface.HandleLowPriorityInput () [0x0000f] in <8c412d4a16f94d4cb337e846f2dee469>:0
at (wrapper dynamic-method) RimWorld.UIRoot_Play.RimWorld.UIRoot_Play.UIRootOnGUI_Patch3(RimWorld.UIRoot_Play)
at (wrapper dynamic-method) Verse.Root.Verse.Root.OnGUI_Patch2(Verse.Root)
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)