ı am trying to grab a hollow cube I created with blend which contains 5 box colliders coinciding with the walls of the hollow cube. I want to be able to grab and transform it but when I use all five colliders with interaction behaviour script from interaction engine I get a runtime error message saying "NullReferenceException:Object reference not set to an instance of an object" in InteractionBehaviour.cs:982 which deep down related to also InteractionController.cd and InteractionManager.cs too. How can I fix it? Or do you have any ideas as to how I can grab the object I mentioned by using ultraleap in unity?