Communicate between a widget and a blueprint actor

Hello Guys,

i wanted to call a custom event in a “Blueprint Actor” from a “Widget” but it doesn’t work. I set the blueprint as a reference variable and linked the custom event from the blueprint. I add a simple print string to my custom event, to check the functionallity. But nothing is shown up on the screen, when i click the button in the widget. Can you tell me, what the problem is?

Thank you!