dlaczego nie teleportuje?

on stepping on a pressure plate:
    if block under is gold block:
        send player title "&e&lCheckpoint!" with subtitle "&fPojawisz sie tu po upadku!" for 1.5 second
        set {checkpoint::%player%} to location of player
        
on walk on barrier:
    teleport player to {checkpoint::%player%}

Tak jak w temacie. skript błędów ne pokazuje