Undefined Method

I got this error on a Transaction from the chest to the players Inventory

Code:

"Could not pass event 'pocketmine\event\inventory\InventoryTransactionEvent' to 'CommandChests v1': Call to undefined method pocketmine\event\inventory\InventoryTransactionEvent::getPlayer() on CommandChests\Main
[09:34:38] [Server thread/CRITICAL]: Error: "Call to undefined method pocketmine\event\inventory\InventoryTransactionEvent::getPlayer()" (EXCEPTION) in "/CommandChests-master/src/CommandChests/Main" at line 29

I don't see what I did wrong, any help?

PHP:

<?php

namespace CommandChests;

use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\command\CommandSender;
use pocketmine\command\Command;
use pocketmine\utils\TextFormat;
use pocketmine\utils\Config;
use pocketmine\Player;

use pocketmine\event\inventory\InventoryTransactionEvent;
use pocketmine\item\Item;

class Main extends PluginBase implements Listener {
   
    public function onEnable(){
        $this->getLogger()->info(TextFormat::AQUA . "has been loaded successfully!");
        $this->getServer()->getPluginManager()->registerEvents($this ,$this);
        $this->saveDefaultConfig();
        $this->reloadConfig();
        //$items = $config->get("Item1", "Item2", "Item3", "Item4", "Item5", "Item6", "Item7", "Item8", "Item9", "Item10", "Item11", "Item12", "Item13", "Item14", "Item15", "Item16", "Item17", "Item18", "Item19", "Item20");
       
        //$config1 = (new Config($this->getDataFolder()."/commands.yml", Config::YAML, array("Item1" => "276", "Item2" => "323", "Item3" => "354", "Item4" => "346", "Item5" => "345", "Item6" => "35:2", "Item7" => "0", "Item8" => "0", "Item9" => "0", "Item10" => "0", "Item11" => "0", "Item12" => "0", "Item13" => "0", "Item14" => "0", "Item15" => "0", "Item16" => "0", "Item17" => "0", "Item18" => "35:14")))->getAll();
    }
   
    public function onTransaction(InventoryTransactionEvent $event){
        $player = $event->getPlayer();
        $inv = $event->getInventory();
        $chest = $inv->getHolder();
        $item = $event->getItem()->getId();
        $cfg = $this->getConfig();
        $playername = $event->getPlayer()->getName();
        if($player instanceof Player){
            if($inv instanceof ChestInventory){
                if($event->getPlayer()->getLevel()->getName() == "New spawn"){
                    $event->setCancelled(true);                  
                    //$item = $chest->getInventory()->getItem($items);
                    if($item === $cfg->get("Item-1") and $cfg->get("Enable-1") == true){
            foreach($cfg->get("Command-1") as $cmd1) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd1));   
            }
            }elseif($item === $cfg->get("Item-2") and $cfg->get("Enable-2") == true){
            foreach($cfg->get("Command-2") as $cmd2) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd2));   
            }
            }elseif($item === $cfg->get("Item-3") and $cfg->get("Enable-3") == true){
            foreach($cfg->get("Command-3") as $cmd3) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd3));   
            }
            }elseif($item === $cfg->get("Item-4") and $cfg->get("Enable-4") == true){
            foreach($cfg->get("Command-4") as $cmd4) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd4));   
            }
            }elseif($item === $cfg->get("Item-5") and $cfg->get("Enable-5") == true){
            foreach($cfg->get("Command-5") as $cmd5) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd5));   
            }
            }elseif($item === $cfg->get("Item-6") and $cfg->get("Enable-6") == true){
            foreach($cfg->get("Command-6") as $cmd6) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd6));   
            }
            }elseif($item === $cfg->get("Item-7") and $cfg->get("Enable-7") == true){
            foreach($cfg->get("Command-7") as $cmd7) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd7));   
            }
            }elseif($item === $cfg->get("Item-8") and $cfg->get("Enable-8") == true){
            foreach($cfg->get("Command-8") as $cmd8) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd8));   
            }
            }elseif($item === $cfg->get("Item-9") and $cfg->get("Enable-9") == true){
            foreach($cfg->get("Command-9") as $cmd9) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd9));   
            }
            }elseif($item === $cfg->get("Item-10") and $cfg->get("Enable-10") == true){
            foreach($cfg->get("Command-10") as $cmd10) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd10));
            }
                        }elseif($item === $cfg->get("Item-11") and $cfg->get("Enable-11") == true){
            foreach($cfg->get("Command-11") as $cmd11) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd11));
            }
                        }elseif($item === $cfg->get("Item-12") and $cfg->get("Enable-12") == true){
            foreach($cfg->get("Command-12") as $cmd12) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd12));
            }
                        }elseif($item === $cfg->get("Item-13") and $cfg->get("Enable-13") == true){
            foreach($cfg->get("Command-13") as $cmd13) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd13));
            }
                        }elseif($item === $cfg->get("Item-14") and $cfg->get("Enable-14") == true){
            foreach($cfg->get("Command-14") as $cmd14) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd14));
            }
                        }elseif($item === $cfg->get("Item-15") and $cfg->get("Enable-15") == true){
            foreach($cfg->get("Command-15") as $cmd15) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd15));
            }
                        }elseif($item === $cfg->get("Item-16") and $cfg->get("Enable-16") == true){
            foreach($cfg->get("Command-16") as $cmd16) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd16));
            }
                        }elseif($item === $cfg->get("Item-17") and $cfg->get("Enable-17") == true){
            foreach($cfg->get("Command-17") as $cmd17) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd17));
            }
                        }elseif($item === $cfg->get("Item-18") and $cfg->get("Enable-18") == true){
            foreach($cfg->get("Command-18") as $cmd18) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd18));
            }
                        }elseif($item === $cfg->get("Item-19") and $cfg->get("Enable-19") == true){
            foreach($cfg->get("Command-19") as $cmd19) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd19));
            }
                        }elseif($item === $cfg->get("Item-20") and $cfg->get("Enable-20") == true){
            foreach($cfg->get("Command-20") as $cmd20) {
            $this->getServer()->dispatchCommand(new ConsoleCommandSender(), str_replace("{player}", $playername, $cmd20));
            }
                    }
                }
            }
        }
    }
}


To get the player do:

PHP:

public function onInvTrans(InventoryTransactionEvent $event){

$transa = $event->getTransaction()->getTransactions();
$int = $event->getTransaction()->getInventories();


        foreach ($transa as $t) {
            foreach ($int as $inst) {


                $inst = $inst->getHolder();
                if ($inst instanceof Player) {
                    $player = $inst;
                }

          
                if ($inst instanceof Chest) {
                    $chest = $inst;
                }

}


}}}