Shirk, buddy, you’re not using that “Actor Has Tag” node properly. You need to connect the “Target” pin to the Object pin coming out of the Event Actor Begin Overlap node. Otherwise, the overlap message occurs, checks whether the BALL (the owning actor) has the tag Triggerbox, and goes from there. You don’t want to know whether the OWNING actor has a tag, but rather whether the actor it COLLIDED with (or overlapped) has a tag.
Incidentally, this uses overlap messages; if you’re looking specifically for COLLISION (as in, physics collision, rather than one actor crossing another one; which one you use depends on the specific circumstances of what you’re doing), you’d do a similar thing but with the Event Hit message rather than the Event Actor Begin Overlap message.