How to kill multiple actors when killing a single one?

I have a level up system, where once the player gets a score of 15 it'll create a few buttons on screen for a level up. I'm trying to kill the button on click, and then have all the other buttons be killed if an actor in their group is killed, but it keeps crashing the game. Does anyone know how to fix this? Thank you in advance!!

Use one of the "For Each Actor ..." blocks: https://www.stencyl.com/blocks/viewCategory/scene-actors