trigger widget animations base on event

Hi, I am trying to play an opening animation for my world space UI when I press a button in the game.

I am struggling to work out how this could be achieved. My initial try bellow comes up with this error :

Play Animation node, requires an animation component. Inside your Widget, create the animation, set a name, then find that animation variable as the target for that node. Widget isn´t an animation, it is a widget, got it?
Outside the widget, you can use any event to get that widget reference and call the function Toggle