There are missing quite a lot as to making the tiger attack, meaning you have no attack event or attack animation in the game
So Ill just show you how to get to the point where the tiger stops, and you can create the attack event and animation. There are some things in the game that you don't really need as I see it, but if they serve some other purpose later on you can ofc just leave them.
But I would remove All the behaviours on the tiger, except "BoundToLayout", "Solid" and then just choose one of the movement behaviours. I kept the platform behaviour for this example.
You don't really need Every tick as C2 will do this automatically. Also Putting the "Set Fullscreen scaling to high quality" you should just do in a "Start of layout" no need to do that every tick.
I have removed your movement action and replaced it with the platform simulate control, the speed of the tiger you can just set through this behaviour.
The next event, is when the tiger gets close to the player it will stop, if the player moves away it will "follow".
So you can add the attack animation and whatever else you need when it attacks here. You will need to add some kind of cool down to the attacks and ofc fix the movement, if the tiger is suppose to move in both directions etc.
Anyway hope it will give you an idea of how to continue.