I don’t know how to have a reference of my lobby menu in order to cast… I hope you will understand what I want to do because I don’t really know how to explain that.
Try plugging your “LobbyMenuRef” (Variable) into the cast’s object pin.
You need a reference to the object you’re trying to cast as before you can go through with the cast
Also, depending on how you’ve set up the reference, you might just be able to work from the “LobbyMenuRef” with no need for a cast.