How do I move multiple actors at the same time?

I am trying to move 8 similar actors at the same time. I saw on this site that a ForEach loop was the best way to do it, but I’m not entirely sure how to use classes using UE4 yet so I just added the actors to an array for the ForEach loop.

Right now when I enter the trigger the first cube moves where it is supposed to, but then nothing else happens. How do I make it so that all of the cubes move together?

Are you sure you are not moving all the actors at the same time? Your blueprint would move all the objects in the array to the EXACT same location. If they are similar meshes, then you might not be noticing that they are occupying the same space.
According to what you are saying, it seems that you want to move the actors in relation to each other (eg. You have a grid of cubes and you want to move that grid somewhere else). The way I would do that is attaching all the actors to the first actor you will move (Right Click > Attach To > Actor, or Alt-A > Select Actor).

Did that work?

You were correct on both the exact problem and solution, thank you very much.