Interacting Event Missing

Hi! I’m trying the tutorial " 8 - Adding Interaction “. I added the Blueprint Interface and the function in it. Then I add the blueprint for Chair Prop and add “Interfaces” already. But in Event graph the can’t find " OnInteract” inside Add Event. I only see “OnInteract” function and “OnInteract (message)” function.

I get it. The thing is. In the tutorial you can create event first. But I can’t ( dunno y). I have to first create the message function in other blueprint then create Event.