To make some points clear:
- you have to choose the AI controller which you have created for your chaser like you have done it.
- you can create another AI controller that tells the zombies to run away. You don’t need to assign the zombie ai controller for the zombies.
- just remove the variable in your controller script.
- if I see it correctly, to get the target, which the chaser should move to, you can replace the zombie variable node with ‘Get all Actors of Class’ and select Zombie1 (your created character) as class, so that the chaser (the ai controller of the chaser) gets all Zombies in the scene and follows one.
To make something about Ai Controllers clear:
- the AI Controller is need to find a way in the created AI Nava Mesh.
Something you maybe don’t know:
- you have to call your custom event somewhere. You can i.e. add Event Begin play Node in front of your AI controller script. Instead of the custom event node. So that the script is started at the beginning you play the game.