Skript error | /clans tag | When setting the suffix, it says "An internal error has occured while attempting to perform this command"

[unrespectful]

So I recently made a /clans tag skript, and it always says that an internal error has occured. Please help!
Skript:
   if arg-2 is set:
    set suffix of {clan::%player's uuid%} to " &a[%arg-2%&a]"
    send "&aClan tag set to %arg-2%&a."

[_Tarna_]

Do you have Vault and a chat plugin? Because in the docs, it says "The prefix or suffix as defined in the server's chat plugin."

https://skripthub.net/docs/?id=2062

[unrespectful]

I have Vault, EssentialsChat, and LuckPerms. Will that cause an error? I can remove vault.

[_Tarna_]

Just now, unrespectful said:

I have Vault, EssentialsChat, and LuckPerms. Will that cause an error? I can remove vault.

No keep Vault. That is needed. Maybe check your server logs after it gives you the internal error to see maybe why it gave you it. Also whats stored inside {clan::%player's uuid%}? Is it a player? Because the syntax is set suffix of player to "something" so make sure it is a player inside that variable. 

[unrespectful]

It has the player's clan stored inside it. It's supposed to give it to all clan members.

[unrespectful]

7 minutes ago, _Tarna_ said:

No keep Vault. That is needed. Maybe check your server logs after it gives you the internal error to see maybe why it gave you it. Also whats stored inside {clan::%player's uuid%}? Is it a player? Because the syntax is set suffix of player to "something" so make sure it is a player inside that variable. 

So I rewrote the skript to support the players, but it still showed the error.
  if arg-1 is "create":
   if arg-2 is set:
    if {clan::%player's uuid%} is not set:
     set {_1} to length of arg-2
     if {_1} is less than 15:
      set {clan} to arg-2
      send "&aClan created: %arg-2%"
      broadcast "&a&l%player% &a&lcreated the clan %arg-2%&a&l!"
      set {clan::%player's uuid%} to arg-2
      add player to {clanplayers::%{clan::%player's uuid%}%}
   else:
    send "&cEither A: You already have a clan, or B: You didn't type a name" to player
  if arg-1 is "tag":
   set suffix of {clanplayers::%{clan::%player's uuid%}%} to " &a[%arg-2%&a]"
   send "&aClan tag set to %arg-2%&a."