Widgets in Dedicated Servers.

I currently have it setup so clients can interact with things using a interact interface. I have successfully added a door that both clients can interact with by pressing E and both clients can see the door open/close when they are suppose to since it’s being done on server. Now I am trying to interact with a box I have setup for interaction. When I interact with the box I want it to open a widget for which ever player interacted with the box. This widget would contain for example a start button that could be pressed by the client to start the game for all clients. Another example could be an option on the widget to change mesh color. The client would interact with the box, widget opens, pick a color and it would update the mesh color for all clients.