bungeecord problemy

witam, mam problem gdyz EXECUTE PLAYER COMMAND nie dziala z komendą SERVER - gdy skript wykonuję komende od bungeecorda to pokazuje mi ze nie ma takiej komendy, a jak ją sam wpisuje to działa.

tutaj moj skrypt:

on join:
    give end crystal named "&0&nTELEPORTER" with lore "", "&c&oKliknij, aby", "&c&owybrać serwer..." to player

on quit:
    clear drops

on place of end crystal:
    cancel event

on right click:
    if player's tool is end crystal:
        wait 2 tick
        open chest inventory with 3 rows named "&8» &7&lTELEPORTER" to the player
        wait 1 tick
        set slot (integers between 0 and 27) of player's current inventory to light gray stained glass pane named "&r"
        set slot 13 of player's current inventory to golden apple named "&8»  &6UHC  &8«" with lore "", "&c&oKliknij, aby", "&c&owybrać serwer..."

on inventory click:
    name of player's current inventory = "&8» &7&lTELEPORTER"
    clicked inventory is not player's inventory
    cancel event
    if clicked slot is 13:
        execute player command "/server uhc"