스코어보드_오류_onEnable

Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new Runnable(){
            @Override
            public void run() {
                for(Player player : Bukkit.getOnlinePlayers()){
                    sidebar.setScore(
                        ChatColor.GREEN+""+ChatColor.BOLD+"플레이 인원",
                        ChatColor.GREEN+""+Bukkit.getOnlinePlayers().size()
                    );
                    sidebar.reinit(player);
                }
            }
        }, 0L, 20L);