Crashing on trade screen after executing the trade offer

Getting this error pretty reliably to the point where I make sure to save before ever starting a trade in my game:
```

Noble Fates Critical Error:

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

UITradeScreenWindowContents.ExecuteTrade () (at :0)

UIElementBehavior.LeftClick () (at :0)

UIButtonBehavior.LeftClick () (at :0)

UIElementBehavior.OnPointerUp (UnityEngine.EventSystems.PointerEventData eventData) (at :0)

UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerUpHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at <7d72c1f7cfd2406486d1466368416c7d>:0)

UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at <7d72c1f7cfd2406486d1466368416c7d>:0)

UnityEngine.EventSystems.EventSystem:Update()

```

Save Game:

The Angelic Oysters.Save 16 (Auto).octsav.gz