Variable Repnotify only applies on server/client

I’m trying to make a ready button for a listen server game and I’ve got a replication problem. As seen in the image, i’m changing the value of the border color in my button depending if the player is ready or not. The problem is that the value change only applies either on the server or client depending of the player clicking. I would like that depending on either player is clicking their ready button the border color change on both server and client. If anyone can point out the replication problem that would be a great.

Widgets cannot be replicated as far as I know.