loader class Sos

how can I make a loader class for my plugin

PocketMine-MP already has one. You should update your plugin from the old API to the new one.

Spoiler

You may show us the console?

Like multiple command classes how can I do that

ps my plugin is new api

Here's an example

\PocketMine\plugins\PluginName\plugin.yml

PHP:

name: PluginName
version: 1.0.0
api: [2.0.0]
main: AuthorName\PluginName\Main
author: Survingo

permissions:
pluginname.command.info:
  description: "Allows using command"
  default: true

\PocketMine\plugins\PluginName\src\AuthorName\PluginName\Main.php

PHP:

<?php
namespace AuthorName\PluginName;

use pocketmine\plugin\PluginBase;

class Main extends PluginBase {

    public function onEnable(){
    $this->getServer()->getLogger()->info("Plugin enabled!");
$this->getServer()->getCommandMap()->register("command-name", new CommandNameClass($this));
    }
}

\PocketMine\plugins\PluginName\src\AuthorName\PluginName\CommandNameClass.php

PHP:

<?php
namespace AuthorName\PluginName;

use pocketmine\command\Command;
use pocketmine\command\CommandSender;
class CommandNameClass extends Command implements \pocketmine\command\PluginIdentifiableCommand {
    /** @var Main $plugin */
       private $plugin;
    public function __construct(Main $plugin){
        parent::__construct("command-name", "description", null, ["aliases"]);
        $this->plugin = $plugin;
        $this->setPermission("pluginname.command.info");
    }
    public function execute(CommandSender $sender, $currentAlias, array $args){ // will be done by running the command
foreach($this->plugin->getServer()->getOnlinePlayers() as $player){
$player->sendMessage("hi");
}
}
}

Where do I add the command As line

[09:04:38] [Server thread/CRITICAL]: Could not load plugin 'PluginCustom'

Ah, I think I got it. I forgot getPlugin() function in CommandNameClass because of the PluginIdentifiableCommand
Here's source code if you want it to run and edit it, just extract it in your plugins folder

Won't work same error

Please show us the complete console from start to error

There

Why are you not using PocketMine-MP? We are a community of PocketMine and not copycats

Cus it's buggy

Ok I'll switch

You should make a space at plugin.yml before plugin.opme:
And class MainBase extends PluginBase{ remember in plugin.yml the main: name
and also remember in your OP.php Command the aliases. If someone would run the command aliases he would run opme

So you are asking for PocketMine API code and then you try to do it with another software because its buggy.
ok

Line 7 in MainBase.php, Main should be MainBase. Line 10 in OP, Main should be MainBase too.

I get the Unknown command error

Means you are registeing an other command and you're running an other one.

You don't use multiple classes for commands for no reason. The onCommand() function in the main class is good enough unless you have like hundreds of lines of code to manage, or if you need some hierarchical relationship between different commands.