why doesn't this work ("on rightclick on enchanting table" is error)

[iFlyi]

on rightclick on enchanting table:
cancel event
set the player's level to {player.level}
open chest with 5 rows named "&6&lEnchanting Table" to player
format slot 0 of player with light blue stained glass named "" to be unstealable
format slot 1 of player with light blue stained glass named "" to be unstealable
format slot 2 of player with light blue stained glass named "" to be unstealable
format slot 3 of player with diamond named "&b%player%: %{player.level}% exp" to be unstealable
format slot 4 of player with light blue stained glass named "" to be unstealable
format slot 5 of player with light blue stained glass named "" to be unstealable
format slot 6 of player with light blue stained glass named "" to be unstealable
format slot 7 of player with light blue stained glass named "" to be unstealable
format slot 8 of player with light blue stained glass named "" to be unstealable

 

[xflyer_23]

#NOTE
#when you end a line off with a colon you must indent the next line
#example:
#
#on rightclick on stick:
#    send "It Works!"        

on rightclick on enchanting table:
    cancel event
    set the player's level to {player.level}
    open chest with 5 rows named "&6&lEnchanting Table" to player
    format slot 0 of player with light blue stained glass named "" to be unstealable
    format slot 1 of player with light blue stained glass named "" to be unstealable
    format slot 2 of player with light blue stained glass named "" to be unstealable
    format slot 3 of player with diamond named "&b%player%: %{player.level}% exp" to be unstealable
    format slot 4 of player with light blue stained glass named "" to be unstealable
    format slot 5 of player with light blue stained glass named "" to be unstealable
    format slot 6 of player with light blue stained glass named "" to be unstealable
    format slot 7 of player with light blue stained glass named "" to be unstealable
    format slot 8 of player with light blue stained glass named "" to be unstealable

 

[SuperEpps22556]

Just a few things removed and this works

on rightclick on enchanting table:
    cancel event
    open chest with 5 rows named "&6&lEnchanting Table" to player
    wait 5 ticks       #wait may not be needed but I include waits in chest guis
    format slot 0 of player with light blue stained glass named "" to be unstealable
    format slot 1 of player with light blue stained glass named "" to be unstealable
    format slot 2 of player with light blue stained glass named "" to be unstealable
    format slot 3 of player with diamond named "&b%player%: %player's level% exp" to be unstealable
    format slot 4 of player with light blue stained glass named "" to be unstealable
    format slot 5 of player with light blue stained glass named "" to be unstealable
    format slot 6 of player with light blue stained glass named "" to be unstealable
    format slot 7 of player with light blue stained glass named "" to be unstealable
    format slot 8 of player with light blue stained glass named "" to be unstealable