explode() expects parameter 2 to be string, boolean given. Wait what?

It hasn't been a week since I started learning about plugin coding so #DontJudge #ImOnly12 #RespectNewbies

This server is running PocketMine-MP 1.6.2dev+poggit.1197 「Unleashed」 implementing API version 3.0.0-ALPHA6 for Minecraft: PE v1.1.0.55 (protocol version 113)

I got a "plugin skeleton" as DevTools says, by doing /genplugin Hey Hey
After that, I edited the code to give me "Heyyyyyyyyy!" when I run the command /hey by this:

PHP:

<?php

namespace Hey\Hey;

use pocketmine\plugin\PluginBase;
use pocketmine\command\CommandSender;
use pocketmine\command\Command;

class Main extends PluginBase{

    public function onEnable(){
        $this->getLogger()->info("Hey enabled!");
    }

    public function onCommand(CommandSender $sender, Command $command, $label, array $args){
        switch($command->getName()){
            case "hey":
                $sender->sendMessage("Heyyyyyyyyyyy!");
                return true;
            default:
                return false;
        }
    }

    public function onDisable(){
        $this->getLogger()->info("Byeeeee");
    }
}


And it gave me this:
[22:01:10] [Server thread/CRITICAL]: Unhandled exception executing command 'hey' in hey: explode()
expects parameter 2 to be string, boolean given
[22:01:10] [Server thread/CRITICAL]: TypeError: "explode() expects parameter 2 to be string, boolean given" (EXCEPTION) in "src/pocketmine/command/Command" at line 189

What have I done wrong? (or have I?)

 

Wow. I can't even do /help anymore.
[22:24:29] [Server thread/CRITICAL]: Unhandled exception executing command 'help' in help: explode() expects parameter 2 to be string, boolean given
[22:24:29] [Server thread/CRITICAL]: TypeError: "explode() expects parameter 2 to be string, boolean given" (EXCEPTION) in "src/pocketmine/command/Command" at line 189

 

add break; before return true;

 

No, just no

Can I see your plugin.yml?

 

I think the problem was with the PocketMine-MP.phar.
It started working after getting a newer one. (And adding the new api 3.0.0-ALPHA7 changes to the plugin)