Hello .. i need help to figure out how to make 1 ai move to another ai.

Hello everyone and thank you for taking time to read my msg.

I am working on Behavior Tree to create some A.I that just follows another AI.

So far i have created 2 AI BPs , 2 Behavior Trees, 2 AI_controllers and 2 Black Boards.

One of my AI is just doing a patrol which uses the main Behavior Tree and black board and i have watched that from youtube. It works perfectly.

The other AI that i want to configure is to just make it follow the other AI (Once or constant i dont mind). In which i havent much success with and i need help.

I will post some screenshots of my configuration. Can someone plz shed me some light? Cause i cant find a solution to my issue.

Those are the blueprints/tanks that i use for the behavior Tree.

The patrol npc is called NPC_BP

Edit: I have set up AiPerception and AiStim as sense.