Ok, now i understand whats happening. You are correct in that you did the item naming different, i didn’t set a default value i literally just typed it in the node, you dont have to keep it that way, you could setup a variable on your lightvial called “name” or something similar and expose it to the editor so its easily modifiable in the properties tab and likewise for the light set a “key” or “trigger item” (name it as you see appropriate) and expose it and link it in the correct place in the blueprint. its up to you how you handle that side of it.
that said, none of that was the problem, the issue is that the collision event is not triggering, which is strange as the vial gets destroyed even though the node is never triggered (unless there’s some crazy physics going on and it just launches through the floor on touch). The easy way to fix it would be to just use a trigger box instead of a collision capsule (mainly because i’ve not looked into collision detection enough to help you solve that issue) but zakman has covered the points i would have mentioned which may solve your issue in both cases.
Also congrats on pronouncing the nick correctly 