Scoreboard error

Hi, I keep getting an error which randomly crashes/disconnects random peoples clients when they join my server.



They only code I use for teams on my scoreboards are:

Code:

    public void unregisterPlayer(Players player){
        for(Players pl : playerobjects){
            if(pl.getSBH().getTeam(player.getPlayername())!=null){
                pl.getSBH().getTeam(player.getPlayername()).unregister();
            }
        }
    }
 
    public void updateAll(Players player){
        for(Players pl : playerobjects){
            if(pl.getSBH().getTeam(player.getPlayername())==null){
                pl.getSBH().registerTeam(player.getPlayername());
                pl.getSBH().getTeam(player.getPlayername()).addPlayer(Bukkit.getPlayer(player.getUUID()));
            }
            pl.getSBH().getTeam(player.getPlayername()).setPrefix(player.getPrefix() + ChatColor.RESET + player.getPrename());
            pl.getSBH().getTeam(player.getPlayername()).setSuffix(player.getSuffix() + ChatColor.RESET + player.getSurname());
        }
    }
 
    public void update(Players player){
        for(Players pl : playerobjects){
            if(pl!=player){
                if(player.getSBH().getTeam(pl.getPlayername())==null){
                    player.getSBH().registerTeam(pl.getPlayername());
                    player.getSBH().getTeam(pl.getPlayername()).addPlayer(Bukkit.getPlayer(pl.getUUID()));
                }
                player.getSBH().getTeam(pl.getPlayername()).setPrefix(pl.getPrefix() + ChatColor.RESET + pl.getPrename());
                player.getSBH().getTeam(pl.getPlayername()).setSuffix(pl.getSuffix() + ChatColor.RESET + pl.getSurname());
            }
        }
    }

Any help would be appreciated

Thanks,
Dablakbandit