Ore gen

Why it dont work?

Code:

<?php
declare(strict_types=1);

namespace Alan;
use pocketmine\scheduler\PluginTask;
use pocketmine\Server;
use pocketmine\block\Block;
use pocketmine\event\Listener;
use pocketmine\math\Vector3;
use pocketmine\item\Item;
use pocketmine\event\player\PlayerInteractEvent;
use pocketmine\Level;
use pocketmine\plugin\PluginBase;
use Alan\Task\DiamondGenTask;

class Main extends PluginBase {
    public function onEnable() {
        $this->scheduler();
    }
    public function scheduler() {
            $this->getScheduler()->scheduleRepeatingTask(new DiamondGenTask($this), 5 * 20);
    }
}

Here the effect task.

Code:

<?php

namespace Alan\Tasks;

use Alan\Main;
use pocketmine\scheduler\PluginTask;
use pocketmine\Server;
use pocketmine\block\Block;
use pocketmine\math\Vector3;
use pocketmine\Level;
use pocketmine\scheduler\Task;
use pocketmine\event\Listener;
use pocketmine\item\Item;
use pocketmine\event\player\PlayerInteractEvent;
use pocketmine\block\Block;

class DiamondGenTask extends Task
{
    /** @var Main */
    private $plugin;

    /**
     * CactusTask constructor.
     * @param Main $plugin
     */
    public function __construct(Main $plugin)
    {
        $this->plugin = $plugin;
    }

    /**
     * @param $currentTick
     */
    public function onRun(int $currentTick)
    {
    $level = $this->getOwner()->getServer()->getLevelByName('Alazar');
        if($level instanceof Level) {
            $gen = new \pocketmime\block\White_glazed_terracotta();
            $tile = $level->getTile(new Vector3($gen->getX() , $gen->getY()+1, $gen->getZ()));
            if($tile instanceof Chest){
                $chest = $tile->getInventory();
                $chest->addItem(Item::get(264, 0, 1));
            }
        }
    }
}

 

there are a few reasons, level may be null, $gen is not defined, coordinates may be wrong, tile is not a chest

 

There are other errors such as wrong use statement for Level and missing use statement for Chest in DiamondGenTask
You instantiated a new Block instance which have no coordinates defined in it and tried to get coordinates from it