már nem tudom mi lehet a hiba.. -_-

public static void updateTab(Player player) {
    if(main.getConfig().getBoolean("Tablist.Enable")) {
        BukkitScheduler scheduler = main.getServer().getScheduler();
        int tick = main.getConfig().getInt("Tablist.UpdateTime");
        scheduler.scheduleSyncRepeatingTask(main, new Runnable() {
            @Override
            public void run() {

                  if (headupdate > main.getConfig().getStringList("Tablist.Header").size()) {
                    headupdate = 1;
                  }
                  if (footupdate > main.getConfig().getStringList("Tablist.Footer").size()) {
                    footupdate = 1;
                  }

                  String Header = main.getConfig().getStringList("Tablist.Header").get(headupdate - 1);

                  String Footer = main.getConfig().getStringList("Tablist.Footer").get(footupdate - 1);

                  headupdate += 1;

                  footupdate += 1;




                            TabList.setHeaderFooter(player, Placeholders.pch(Header, player), Placeholders.pch(Footer, player));

            }


        }, 20L, tick);
    }
}
    @EventHandler
    public void onUpdate(PlayerJoinEvent e) {

        for(Player online : Bukkit.getOnlinePlayers()) {

        TabListListeners.updateTab(online);

        Prefix.tabPrefix(online, main);

        }
    }