Widget within widget problem - Urgent

I’m creating a main menu with a button that when pressed, goes to another widget (instructions) with a button to let the player go back to the main menu. I’ve been able to do it in 4.5 but I can’t in 4.6. Why?

Blueprint that doesn’t work (highlighted). The instructions node should be able to link to the set main menu node.

Blueprint that does work.

If both the main menu & instructions screen have a “main menu” variable, then in the first image, the main menu is setting its own main menu variable.