[Help] Can't transfer inventory from player to block

I'm trying to transfer all the inventory of a player to a block, spawned on the place were he dies (on MCreator 2023.1 for forge 1.18.2).

I was able to make the block spawn but i'm having issues with the inventory transfer.

Here the screenshot of the procedure: 

The x, y and z are local variables where I've put the actual coordinates of the player when he died, and block_slot begins from 0 and is the slot of the bock GUI.

I really don't understand what I'm doing wrong...the exp bottle part works but the for each with the itemstack iterator no.

UPDATE:

I think it's a problem of the event/target entity (this procedure uses the global trigger "when entity dies") because I tried to apply that "code" to the block right clicked trigger and it works. Any ideas how to solve it?