Possible error spawning animals

[FallenBR]

Hello friends!

Receiving various of this errors just before or after the normal log message "Spawning Random Prey, Because I Can. Deal with it....". I think some animals may not be spawning normally. Any directions, corrections or ideias of what I'm losing in my game?

The red log error:
Could not execute post-long-event action. Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at AnimalVariations.AnimalMultiSkins.ApplyNewSkin (Int32 index) [0x00000] in <filename unknown>:0
  at AnimalVariations.AnimalMultiSkins.<Tick>b__24_0 () [0x00000] in <filename unknown>:0
  at Verse.LongEventHandler.ExecuteToExecuteWhenFinished () [0x00000] in <filename unknown>:0
Verse.Log:Error(String, Boolean)
Verse.LongEventHandler:ExecuteToExecuteWhenFinished()
Verse.LongEventHandler:ExecuteWhenFinished(Action)
AnimalVariations.AnimalMultiSkins:Tick()
RimWorld.Planet.WorldPawns:WorldPawnsTick()
RimWorld.Planet.World:WorldTick()
Verse.TickManager:DoSingleTick()
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()

I'm using these animal mods:

<li>[1.0] Wild Animal Sex V4.1</li>
<li>A Dog Said... Animal Prosthetics</li>
<li>Animals Logic</li>
<li>Hunt for Me</li>
<li>Kill For Me</li>
<li>Vanilla Animals Overhaul Reloaded</li>
<li>Vanilla Animals Expanded — Livestock</li>
<li>AnimalCollabProj</li>
<li>ZWAnimals</li>
<li>Spidercamp's Dog Pack (1.0)</li>
<li>FishIndustry</li>
<li>Rimbirds</li>
<li>[Syulipia]SlimeMOD</li>
<li>[Syulipia]OrientalDragonMOD</li>
<li>Flommel [1.0]</li>
<li>Animal Variety Coats</li>

Thanksssss!

[Canute]

Since the word "AnimalVariations" are at the error msg. i would point at Animal Variety Coats.
Ask the mod author about that error.