How do I get an AI to follow another AI?

Hey, I can not simply cast to the AI… I need an object to go into the cast node… if I chase the player character its simply ‘get player character’ into the cast to ‘player’ and then go into the AI move to node… but as it is not the player character the ‘get player character or get player pawn’ node does not work. I have also tried ‘get player controller and get AI controller’… none of these object nodes work… what can I do about that? Thanks.