When defeating the Mykara I receive the following error 

NullReferenceException: Object reference not set to an instance of an object

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CreepingNode.IsConstructionPaused ()

CreepingNodeConstructionLabel.RefreshContent ()

CreepingNodeConstructionLabelLayerPanel.RefreshWorldEntityBinding (.AgeTransform tableitem, IWorldEntityWithCulling worldEntity, Int32 index)

AgeTransform.RefreshChildrenIList[IWorldEntityWithCulling] (IList`1 refCollection, .RefreshTableItem`1 refreshDelegate, Boolean enableTheVisible, Boolean strictVisibility)

CreepingNodeConstructionLabelLayerPanel.RefreshLayerLabel ()

LabelLayerPanel`1[T].WorldEntityCullingService_WorldEntityCullingUpdate (System.Object sender, .WorldEntityCullingUpdateEventArgs e)

DefaultWorldEntityCulling.LateUpdate ()

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V1.8.15 S3  (64-bit)

here is the save state.

Cultists - Turn 185.sav

If I click continue, the error just reappears, making continuing the game from this point impossible. If it helps, I am playing on the Microsoft store using game pass. I am playing as the Cultists.