You're gonna have fun with this one... had to force-close the game via task manager.
NullReferenceException: Object reference not set to an instance of an object
at RewardSkill.SetupReward () [0x00000] in <filename unknown>:0
at BaseReward.get_Icon () [0x00000] in <filename unknown>:0
at XUiC_QuestRewardEntry.GetBindingValue (System.String& value, .BindingItem binding) [0x00000] in <filename unknown>:0
at BindingItem.GetValue (Boolean forceAll) [0x00000] in <filename unknown>:0
at BindingInfo.RefreshValue (Boolean forceAll) [0x00000] in <filename unknown>:0
at XUiController.RefreshBindings (Boolean forceAll) [0x00000] in <filename unknown>:0
at XUiC_QuestRewardEntry.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiController.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiC_QuestRewardList.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiController.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiController.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiController.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiController.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUiC_QuestWindowGroup.Update (Single _dt) [0x00000] in <filename unknown>:0
at XUi.OnUpdateDeltaTime (Single updateDeltaTime) [0x00000] in <filename unknown>:0
at A.ME.Update () [0x00000] in <filename unknown>:0
at GameManager.JQ () [0x00000] in <filename unknown>:0
at GameManager.Update () [0x00000] in <filename unknown>:0