4-25 How to set OnMouseHover and OnMouseLeave on Widgets?

Hello all,

I don’t understand how everybody except me can set a mouse hover and mouse leave event on their widget. I saw from 3 different questions that we can do it:

However I created my own slider BP class with the base slider as a parent and I still can’t catch these events. Only time I can catch these events are on interfaces without being able to specify the target… what’s the point of knowing when the mouse enters or leaves the entire interface? 0_o

Note before people tell I should have asked a question instead; form seems to be bugged and I could not post a question even if I had selected a version tag: