How to Interact with VR Widget and Actor?

[luckpolar]

Hi,Mitch and everybody.
First of all,Thank you for your Plugins,Mitch.
I’m sorry for my poor understanding and here is my question.
MY GOAL:I want to use the VR Widget which is an actor(named “MenuActor”) in your video to change a static mesh material in another actor BP(named “Interactable box” in my project).
I set my Pawn BP and UMG BP as similar as yours in the video.
In the UMG Widget BP, I have already set two buttons and add click event to each of them and add the event with independent dispatchers.Here is my UMG Widget BP Setting.

And I could bind the event dispatchers in cube with create widget(Class:UMG Widget)
Here is my Cube BP picture.

Here is my Pawn BP setting pictures.

[luckpolar]

Here is my MenuActor BP setting(In my project,Its name is “VR_Widget”)

But, when I click the MenuActor in VR Preview Mode, the buttons show clicked but the cube doesn’t change material.
SO,Where did I go wrong? If you’re convenient, please post some pictures with notes, and I could understand your meaning clearly.

[anonymous_user_136907e0]

video tutorial?