please don't upload skripts with only a week of knowledge...
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It is made much too complicated with me it would be 6 lines. Also, the script is only for LuckPerms which is also not very good

dafuq do you mean "fixed {@p}"? its still in the code lmao
send {@p}"I'm missing nick"

smh

dafuq?
{@p}"I'm missing nick"

this will send you

[StaffChat]"I'm missing nick

bruh

loop all players:
if loop-player has permission "staff.chat":
send "&8[&3StaffChat&8] &e%player's display name%&7: %arg 1%" to loop-player

???
send "&8[&3StaffChat&8] &e%player%&7: %arg-1%" to all players where [input has permission "staff.chat"]

also not even using {@p} for the prefix smh

there is many other things wrong but im just not gonna put them smh