Server::getPlayer($args[0]) returns null

Hi! I've been trying to fix my code to give my players freeze and Confuse but i couldn't make it happen. It seems not working. My ARGS issue has been solved but not this. It would be a great help if anyone could help me.
Thanks

My error: Freeze has the same Error
[Server thread/CRITICAL]: Unhandled exception executing command 'conf InspectorGadget' in conf: Argument 1 passed to freezer\main::confuse() must be an instance of pocketmine\Player, null given, called in /home/gs/gs/data/servers/4016401/plugins/Freezer/src/freezer/main.php on line 70 2016-11-30
[Server thread/CRITICAL]: TypeError: "Argument 1 passed to freezer\main::confuse() must be an instance of pocketmine\Player, null given, called in /home/gs/gs/data/servers/4016401/plugins/Freezer/src/freezer/main.php on line 70" (EXCEPTION) in "/Freezer/src/freezer/main" at line 52

My full main.php

PHP:


<?php

namespace freezer;

use pocketmine\Player;
use pocketmine\event\Cancellable;
use pocketmine\Server;
use pocketmine\utils\Config;
use pocketmine\plugin\PluginBase;
use pocketmine\utils\TextFormat;
use pocketmine\event\player\PlayerChatEvent;
use pocketmine\event\Listener;
use pocketmine\entity\Effect;
use pocketmine\plugin\Plugin;
use pocketmine\command\CommandSender;
use pocketmine\command\PluginCommand;
use pocketmine\command\Command;
use pocketmine\command\CommandExecutor;
use pocketmine\command\ConsoleCommandSender;

class main extends PluginBase implements Listener {

    public $manager;

    public function onEnable() {
        if(!is_dir($this->getDataFolder())) {
            @mkdir($this->getDataFolder());
        }
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        $this->getConfig()->getAll();
        if($this->getConfig()->get("Enable") == true) {
            $this->setEnabled(true);
            return;
        $this->saveDefaultConfig();
        $server = Server::getInstance();
        $this->manager = new manager($this, $activeForWorlds);
        }
    }

    public function isFrozen(Player $player){
        return in_array($player->getName(), $this->frozen);
    }

    public function freeze(Player $player){
        $this->frozen[$player->getName()] = $player->getName();
    }

    public function unfreeze(Player $player){
        unset($this->frozen[$player->getName()]);
    }

    public function confuse(Player $player){
        $this->confuse[$player->getName()] = $player->getName();
    }

    public function unConfuse(Player $player){
        unset($this->confuse[$player->getName()]);
    }

    public function isConfused(Player $player){
        return in_array($player->getName(), $this->confuse);
    }
        // if($this->getPlugin()->isFrozen($target) !== true){
    public function onCommand(CommandSender $sender, Command $command, $label, array $args){
        //if($sender instanceof Player){
            switch($command){
                case "conf": {
                    if (isset($args[0])) {
                        $target = $this->getServer()->getPlayer($args[0]);
                        $this->confuse($target);
                        $sender->sendMessage("$target has been confused!");
                        $target->sendMessage("You've been Confused!");
                        return true;
                    }
                }
                break;
                case "unfr": {
                    if(isset($args[0])) {
                        $player = $this->getServer()->getPlayer($args[0]);
                            $sender->sendMessage("$player has been unfrozen");
                        return true;
                    }
                    else {
                        $sender->sendMessage(TextFormat::RED . "[Freezer] Missing arguments");
                    }
                }
                break;
                case "fr": {
                    if(isset($args[0])){
                            $player = $args[0];
                            $sender->sendMessage("Freezing > $player");
                            $file = new Config($this->getDataFolder() . "players.txt", Config::ENUM);
                            $file->set($player, $player);
                            $file->save();


                            $target = $this->getServer()->getPlayer($args[0]);
                                if($target !== null){
                                        $this->freeze($target);
                                        $sender->sendMessage($target->getName() . " §ahas been frozen!");
                                        $target->sendMessage("§eYou have been §bfrozen§e!");
                                        return true;
                                }



                            $sender->sendMessage("You have perm froze > $player");
                            return true;
                    }
                    else{
                        $sender->sendMessage(TextFormat::RED . "[Freezer] Missing arguments");
                    }
                break;
                }
            }
        //}
        //else {
        //    $sender->sendMessage("In game!");
        //}
    }
  
    public function onDisable() {
        $this->freezer->saveAll();
        $this->getConfig()->saveAll();
    }
}


 

Any help will be very much appreciated.

 

Please can you change the title to something more helpful?

 

That doesnt return error but it doesnt confuse the player when online...