I have checked Animal Variety Coats and it cause the same error as Vanilla Animals Expanded. Looks like any mod that uses tutorial from Animal Variety Coats mod will cause the same error:

Exception filling window for Verse.Dialog_DebugOptionListLister: System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.IncidentWorker_Raid.TryExecuteWorker (RimWorld.IncidentParms parms) [0x00000] in <filename unknown>:0
at RimWorld.IncidentWorker_RaidEnemy.TryExecuteWorker (RimWorld.IncidentParms parms) [0x00000] in <filename unknown>:0
at RimWorld.IncidentWorker.TryExecute (RimWorld.IncidentParms parms) [0x00000] in <filename unknown>:0
at Verse.Dialog_DebugActionsMenu.DoRaid (RimWorld.IncidentParms parms) [0x00000] in <filename unknown>:0
at Verse.Dialog_DebugActionsMenu+<DoListingItems_MapActions>c__AnonStorey8+<DoListingItems_MapActions>c__AnonStoreyA+<DoListingItems_MapActions>c__AnonStoreyB+<DoListingItems_MapActions>c__AnonStoreyC.<>m__0 () [0x00000] in <filename unknown>:0
at Verse.Dialog_DebugOptionLister.DebugAction (System.String label, System.Action action) [0x00000] in <filename unknown>:0
at Verse.Dialog_DebugOptionListLister.DoListingItems () [0x00000] in <filename unknown>:0
at Verse.Dialog_OptionLister.DoWindowContents (Rect inRect) [0x00000] in <filename unknown>:0
at Verse.Window+<WindowOnGUI>c__AnonStorey0.<>m__0 (Int32 x) [0x00000] in <filename unknown>:0
Verse.Log:Error(String, Boolean)
Verse.<WindowOnGUI>c__AnonStorey0:<>m__0(Int32)
UnityEngine.GUI:CallWindowDelegate(WindowFunction, Int32, Int32, GUISkin, Int32, Single, Single, GUIStyle)