Refreshsigns dont work

PHP:

class RefreshSigns extends PluginTask {
    public $prefix = TE::WHITE . "-=" . TE::RED. TE::BOLD . "TeamPvP" . TE::WHITE . "=-";
    public function __construct($plugin)
    {
        $this->plugin = $plugin;
        parent::__construct($plugin);
    }
 
    public function onRun($tick)
    {
        $allplayers = $this->plugin->getServer()->getOnlinePlayers();
        $level = $this->plugin->getServer()->getDefaultLevel();
        $tiles = $level->getTiles();
        foreach($tiles as $t) {
            if($t instanceof Sign) {   
                $text = $t->getText();
                if($text[3]==$this->prefix)
                {
                    $aop = 0;
                                        $namemap = str_replace("§6", "", $text[2]);
                    foreach($allplayers as $player){if($player->getLevel()->getFolderName()==$namemap){$aop=$aop+1;}}
                    $ingame = TE::AQUA . "§7[§aJoin§7]";
                    $config = new Config($this->plugin->getDataFolder() . "/config.yml", Config::YAML);
                    if($config->get($namemap . "PlayTime")!=700)
                    {
                        $ingame = TE::RED . "§7[§4Closed§7]";
                    }
                    elseif($aop>=16)
                    {
                        $ingame = TE::WHITE . "§7[§6Full§7]";
                    }
                                        $t->setText($ingame,TE::WHITE  . $aop . " / 16",$text[2],$this->prefix);
                }
            }
        }
    }
}