I need help with this skript!

[Patsteaks123]

# CREDITS: PatSteaks IDEA: ButterflyBullets



options:
 luckblock: sponge named "&6Lucky Block"
 give:&3[SERVERNAME] You have used &6/luckyblock!

# Command Setup

command /luckyblock [<player>]:
 aliases: lb
 trigger:
   if arg is set:
  
  # Sends a message to arg
  
  send "{@give}" to arg
  give sponge named "&6LuckyBlock" to arg
 
 #Gives the item to set arg
  
on place of {@luckyblock}:
    set {placed::%event-block's location%} to arG
 
on break of {@luckyblock}:
    if {placed::%event-block's location%} is arg:
    drop a random element of all items
	 
   if arg is not set:
   
   # Sends a message to unset arg
   
  send "{@give}" to player
  give sponge named "&6LuckyBlock" to player
  
  #Gives the item to unset arg
  
on place of {@luckyblock}:
    set {placed::%event-block's location%} to player
 
on break of {@luckyblock}:
    if {placed::%event-block's location%} is player:
    drop a random element of all items

First of all I do not know why this is working, Am I missing a plugin?

[Pryzmm]

21 hours ago, Patsteaks123 said:

# CREDITS: PatSteaks IDEA: ButterflyBullets



options:
 luckblock: sponge named "&6Lucky Block"
 give:&3[SERVERNAME] You have used &6/luckyblock!

# Command Setup

command /luckyblock [<player>]:
 aliases: lb
 trigger:
   if arg is set:
  
  # Sends a message to arg
  
  send "{@give}" to arg
  give sponge named "&6LuckyBlock" to arg
 
 #Gives the item to set arg
  
on place of {@luckyblock}:
    set {placed::%event-block's location%} to arG
 
on break of {@luckyblock}:
    if {placed::%event-block's location%} is arg:
    drop a random element of all items
	 
   if arg is not set:
   
   # Sends a message to unset arg
   
  send "{@give}" to player
  give sponge named "&6LuckyBlock" to player
  
  #Gives the item to unset arg
  
on place of {@luckyblock}:
    set {placed::%event-block's location%} to player
 
on break of {@luckyblock}:
    if {placed::%event-block's location%} is player:
    drop a random element of all items

First of all I do not know why this is working, Am I missing a plugin?

send the error?