Update a leadboard

Hello! I have made a plugin that contains leaderboards but I found the problem that the leadboard does not update (Im noob ) and I wanted to know if any of you could help me ...

Code:

PHP:

<?php

namespace IvanCraft623\EnderHCF\Entity;

use pocketmine\entity\Monster;
use pocketmine\entity\EntityIds;
use pocketmine\scheduler\ClosureTask;

use IvanCraft623\EnderHCF\EnderHCF;

class TopKills extends Monster{

    const NETWORK_ID = EntityIds::CHICKEN;

    public $height = 0.7;
    public $width = 0.4;
    public $gravity = 0;

    protected $plugin;

    public function getName(): string {
        return "TopKills";
    }

    public function initEntity(): void {
        parent::initEntity();
        $this->setImmobile(true);
        $this->setHealth($this->getHealth());
        $this->setNameTagAlwaysVisible(true);
        $this->setScale(0.001);
    }

    public function onUpdate(int $currentTick): bool {
        $kills = EnderHCF::getInstance()->kills;
        $AllKills = $kills->getAll();
        arsort($AllKills);
        $top = 1;
        $nametag = "§l§f✘ §6Leaderboard §eKills §f✘\n";
        foreach($AllKills as $name => $value){
            if($top > 10)break;
            $nametag .= "§6#{$top} §f{$name} §7- §b{$value} §3kills\n";
            $top++;
        }
        $this->setNameTag($nametag);
        return parent::onUpdate($currentTick);
    }
}

Plugin:
http://www.mediafire.com/file/4zk3gznn0kgfnf0/EnderHCF.zip/file

 

instead of

PHP:

return parent::onUpdate($currentTick);

do

PHP:

parent::onUpdate($currentTick);
return true;

 

it does not work

 

"I have made a plugin" it's a copy paste letter by letter, space by space of my Speed Coding . And you don't have to make anything, the entity is updated automatically

 

exposed