Add loop value

[BoxMiners]

i was making an admin tools skript, then i ran into a weird problem. I really need help if anyone have a solution please write it

on inventory click:
 if inventory name of player's current inventory is "&cAdmin Tools":
  if clicked slot is 0:
   cancel event
  else if clicked slot is 22:
   cancel event
   wait 1 tick
   open chest with 6 rows named "&cTools" to player
   wait 1 tick
   loop {ri.%player%::*}:
    add loop-value to current inventory of player
    set {secstore.%player%} to true
    stop

on inventory close:
 {secstore.%player%} is true:
  clear {ri.%player%::*}
  loop 54 times:
   set {ri.%player%::%loop-number - 1%} to slot "%loop-number - 1%" parsed as an integer of current inventory of player
   set {secstore.%player%} to false
   send "&8[&aBoxMinersV&8]  &7The Backpack was saved."
   stop
   {adminsecstore.%player%} is true:
    clear {ri.%{asec.%player%}%::*}
    loop 54 times:
     set {ri.%player%::%loop-number - 1%} to slot "%loop-number - 1%" parsed as an integer of current inventory of player
     set {adminsecstore.%player%} to false
     send "&8[&aBoxMinersV&8]  &7The Backpack was saved."
     clear {asec.%player%}

on inventory click:
 if inventory name of player's current inventory is "&cAdmin Tools":
  if clicked slot is 0:
   cancel event
  else if clicked slot is 10:
   cancel event
   open chest with 6 rows named "&cTools" to player
   wait 1 tick
   loop {ri.%player%::*}:
    add loop-value to current inventory of player
   stop

It has errors!

ERRORS:

 

[TweedeKamer]

maybe do this before that part

set {_slot} to loop-value - 1