Generator bambusa

on place hopper:
    if name of player's tool is "&5&lGenerator &a&lBambusa":
        wait 2 ticks
        add location of targeted block to {gen.bamboo::*}
        
on break hopper:
    if {gen.bamboo::*} contains location of target block:
        cancel event
        remove location of targeted block from {gen.bamboo::*}
        break target block
        drop 1 hopper named "&5&lGenerator &a&lBambusa"
    
command /generator:
    trigger:
        give 1 hopper named "&5&lGenerator &a&lBambusa" to player
        
command /generator2:
    trigger:
        send "%{gen.bamboo::*}%" to player
        
command /generator3:
    trigger:
        clear {gen.bamboo::*}
    
every 1 seconds:
    loop {gen.bamboo::*}:
        add 5 bamboo to location of loop-value

Blad mi wyskakuje:

the location of loop-value can't have anything added to it

Wersja mc 1.20.4 

Wersja skript 2.8.3