UMG animation call from another bluprint

Hi, it’s probably a totally simple thing, but unfortunately I don’t understand how to do it. I have an animation (a menu becomes visible) in my UMG interface, I would like to activate this by clicking or touching on an object within my game.
I have already implemented the following, I think the only thing missing is the communication between the two blueprints.

Thank you!

Does the K key execute the function you wish?

Yes, it does.

In the meantime I have tried using an event dispatcher, but unfortunately I also get an error message. Can i use a normal Actor BP to call the dispatcher?