blueprints – Blocks / tiles aren’t responding to clicks

I’ve recently finished a tutorial, UE4 Slide Puzzle by Nicholas Thompson. Halfway through the second tutorial, I found out that the blocks / tiles wouldn’t respond to my clicks. For example, when I clicked on a tile, it wouldn’t print out a Hello message.

I have watched the tutorial so many times already, I’ve searched it up, looked at my code thoroughly, and I can’t find any problems. Here are my blueprints:

  1. Event Graph
  2. Get Move To (Function)

After some debugging, I found out that the problem occured at the start of the function, Mesh Clickedm in the Event Graph.

Please help, it would be greatly appreciated. Thank you!