Sorry, for the late reply. I only get notified when questions are asked on the marketplace page.
This crash doesn’t really seem to be connected to this plugin. I suggest checking your particular BP code near the following event:
LogPlayLevel: MainUI_C.ExecuteUbergraph_MainUI
LogPlayLevel: MainUI_C.BndEvt__ExitButton_K2Node_ComponentBoundEvent_3_OnButtonClickedEvent__DelegateSignature
Could you solve your other problem? 