Dynamic Material Instance

I’ve been trying to implement this idea UE4 - Tutorial - Dynamic Materials in BluePrints! (Request!) - YouTube but with overlapping the trigger box and glass material which is initally opaque. But encountered this error This blueprint (self) is not a MaterialInstanceDynamic, therefore ’ Target ’ must have a connection. Here is my Event Graph

You have not connected the Create Material Instance block.

Hello, just use another Create Dynamic Material Instance node, which has no Primitive component node as input.