When entity dies, check if player has a specific item in inventory

Hello! I would like that when a specific entity dies, it checks whether the player has a specific item in their inventory, and if they do, it changes the custom data logic tag.

The problem is that when I create the procedure, it doesn’t let me select it in the “when entity dies” section because there are “missing dependencies.” I’ve tried to fix it in a thousand ways, but I can’t find the solution.

If anyone knows how I could solve it or has any clues, I would be very grateful. Thank you very much! :)