Can anyone help me with this scoreboard skript?

[KingEthan]

I can't get the exp to show. all it says is "there's no loop that matches loop-player to 3" 

Skript:
 

every 5 seconds:
    loop all players:
        wipe loop-player's sidebar
        set name of sidebar of loop-player to "&6GunKit"
        set score "&6Name: &3%loop-player's name%" in sidebar of loop-player to 5
        set score "&6Rank: &3%loop-player's prefix%" in sidebar of loop-player to 4
        set score "&6Level: &3%loop-player's xp%" in sidebar of loop-player to 3
        set score "&6Kills: &3%{kills.%loop-player%}%" in sidebar of loop-player to 2
        set score "&4Deaths: &3%{deaths.%loop-player%}%" in sidebar of loop-player to 1
        

on death:
  add 1 to {kills.%attacker%}
  add 1 to {killstreak.%attacker%}
  add 1 to {deaths.%victim%}
  set {killstreak.%victim%} to 0

on first join:
  set {kills.%player%} to 0
  set {killstreak.%player%} to 0
  set {deaths.%player%} to 0
  set {killstreak.%player%} to 0