whats wrong with this code

Spoiler: The Code

PHP:

<?php

/*
*
*   ____        __  __                                  
*  / __ \      |  \/  |                                 
* | |  | |_ __ | \  / | __ _ _ __   __ _  __ _  ___ _ __
* | |  | | '_ \| |\/| |/ _` | '_ \ / _` |/ _` |/ _ \ '__|
* | |__| | |_) | |  | | (_| | | | | (_| | (_| |  __/ |  
*  \____/| .__/|_|  |_|\__,_|_| |_|\__,_|\__, |\___|_|  
*        | |                              __/ |         
*        |_|                             |___/          
*
* OpManager is Soon Number #1 Op Managment Plugin
*
*
*
*/
namespace mcrafters;
use pocketmine\event\player\PlayerKickEvent;
use pocketmine\utils\Config;
use pocketmine\event\Listener;
use pocketmine\plugin\PluginBase;
use pocketmine\utils\TextFormat as MT;
use pocketmine\event\player\PlayerPreLoginEvent;
use pocketmine\event\player\PlayerChatEvent;
use pocketmine\event\player\PlayerCommandPreprocessEvent;
use pocketmine\command\PluginCommand;
use pocketmine\command\Command;
use pocketmine\command\CommandSender;
use pocketmine\command\CommandExecutor;
use pocketmine\permission\PermissionAttachment;
use pocketmine\permission\Permissible;
use pocketmine\permission\Permission;
use pocketmine\Server;
use pocketmine\permission\PermissionRemovedExecutor;
use pocketmine\command\ConsoleCommandSender;

class OpManager extends PluginBase implements Listener
{
    public $cfg;
   
    public function onEnable()
    {
            $this->getServer()->getPluginManager()->registerEvents($this, $this);
            $this->getServer()->getLogger()->info(MT::AQUA . "Op-" . MT::YELLOW . "Manager" . MT::GREEN . " has loaded");
            @mkdir($this->getDataFolder());
            $this->saveResource("config.yml");
            $this->cfg = new Config ($this->getDataFolder() . "config.yml", Config::YAML);
        }
      public function onKick(PlayerKickEvent $omke)
      {
        if($omke->getPlayer()->hasPermission('opmanager.nokick')){
            $omke->setCancelled(true);
        }
      }
      public function onPreLogin(PlayerPreLoginEvent $ompe)
      {
        if($ompe->getPlayer()->isBanned() and $ompe->getPlayer()->hasPermission('opmanager.noban')){
            $ompe->getPlayer()->setBanned(false);
        }
      }
      public function onCommandPreprocess(PlayerCommandPreprocessEvent $ome)
      {
       if($ome->getMessage() === "/stop" and $ome->getPlayer()->hasPermission('opmanager.disablestop.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableStopCommand"));
             $ome->setCancelled();
         }
                 if($ome->getMessage() === "/say" and $ome->getPlayer()->hasPermission('opmanager.disablesay.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableSayCommand"));
             $ome->setCancelled();
                 }
                     if($ome->getMessage() === "/ban" and $ome->getPlayer()->hasPermission('opmanager.disableban.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableBanCommand"));
             $ome->setCancelled();
                     }
                     if($ome->getMessage() === "/ban-ip" and $ome->getPlayer()->hasPermission('opmanager.disablebanip.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableBanipCommand"));
             $ome->setCancelled();
                     }
                     if($ome->getMessage() === "/whitelist" and $ome->getPlayer()->hasPermission('opmanager.disablewhitelist.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableWhitelistCommand"));
             $ome->setCancelled();
                     }
                     if($ome->getMessage() === "/kill" and $ome->getPlayer()->hasPermission('opmanager.disablekill.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableKillCommand"));
             $ome->setCancelled();
                     }
                     if($ome->getMessage() === "/time" and $ome->getPlayer()->hasPermission('opmanager.disabletime.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableTimeCommand"));
             $ome->setCancelled();
                     }
                     if($ome->getMessage() === "/op" and $ome->getPlayer()->hasPermission('opmanager.disableop.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableOpCommand"));
             $ome->setCancelled();
                     }
                     if($ome->getMessage() === "/deop" and $ome->getPlayer()->hasPermission('opmanager.disabledeop.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableDeopCommand"));
             $ome->setCancelled();
                     }
                    if($ome->getMessage() === "/tp" and $ome->getPlayer()->hasPermission('opmanager.disabletp.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableTpCommand"));
            $ome->setCancelled();
                    }
                   if($ome->getMessage() === "/me" and $ome->getPlayer()->hasPermission('opmanager.disableme.command')){
             $ome->getPlayer()->sendMessage($this->cfg()->get("DisableMeCommand"));
            $ome->setCancelled();
                    }
}
public function onCommand(CommandSender $sender,Command $command,$label,array $args){
    if($command->getName() == "opmanager"){
        $sender->sendMessage(MT::YELLOW."Do /om help");
    if(isset($args[0])){
    if($args[0] == "help"){
        $sender->sendMessage(MT::GOLD."Help Page 1 From 1");
        $sender->sendMessage(MT::GREEN ."/om protect <player>" . MT::YELLOW . " : Protect Player From Getting Kicked Or Banned");
        $sender->sendMessage(MT::GREEN ."/om disablecmd <command> <player>" . MT::YELLOW . " : Disable The Command For The Player");
        $sender->sendMessage(MT::GREEN ."/om enablecmd <command> <player>" . MT::YELLOW . " : Enable The Command For The Player");
        $sender->sendMessage(MT::RED . "You Can Disable Or Enable Only The Following Commands");
        $sender->sendMessage(MT::AQUA . "stop, say, ban, ban-ip, me, whitelist, kill, time, op, deop, tp");
    }
        $lol = $args[1];
        $player = $this->getServer()->getPlayer($lol);
    if($args[0] == "protect" and $player instanceof Player){
        $perm = Server::getInstance()->getPluginManager()->getPermission('opmanager.nokick' and 'opmanager.noban');
        $player->addAttachment($this, $perm, true);
        $sender->sendMessage(MT::GREEN. "You Have Succesfully Protected" . $player);
        unset($args[1]);
    }
}
}
}
       
       
    public function translateColors($symbol, $message){
       
        $message = str_replace("&", "$", $message);
        $message = str_replace($symbol."0", MT::BLACK, $message);
        $message = str_replace($symbol."1", MT::DARK_BLUE, $message);
        $message = str_replace($symbol."2", MT::DARK_GREEN, $message);
        $message = str_replace($symbol."3", MT::DARK_AQUA, $message);
        $message = str_replace($symbol."4", MT::DARK_RED, $message);
        $message = str_replace($symbol."5", MT::DARK_PURPLE, $message);
        $message = str_replace($symbol."6", MT::GOLD, $message);
        $message = str_replace($symbol."7", MT::GRAY, $message);
        $message = str_replace($symbol."8", MT::DARK_GRAY, $message);
        $message = str_replace($symbol."9", MT::BLUE, $message);
        $message = str_replace($symbol."a", MT::GREEN, $message);
        $message = str_replace($symbol."b", MT::AQUA, $message);
        $message = str_replace($symbol."c", MT::RED, $message);
        $message = str_replace($symbol."d", MT::LIGHT_PURPLE, $message);
        $message = str_replace($symbol."e", MT::YELLOW, $message);
        $message = str_replace($symbol."f", MT::WHITE, $message);
        $message = str_replace($symbol."l", MT::BOLD, $message);
        $message = str_replace($symbol."o", MT::ITALIC, $message);
        $message = str_replace($symbol."r", MT::RESET, $message);
       

/*
                $perm = Server::getInstance()->getPluginManager()->getPermission($args[1]);
                $player->addAttachment($this, $perm, true);
        return $message;
*/
    }
    public function onDisable()
    {
        $this->getLogger()->info(MT::AQUA . "Op-" . MT::YELLOW . "Manager" . MT::RED . " has unloaded");
    }
}       
?>


Code:

Notice: Undefined offset: 1 in C:\Users\Family\Desktop\ImagicalMine-Windows-master\plugins\Op-Manager_v4.2.0\src\mcrafters\OpManager.php on line 122

Where the heck is line 122?

PHP:

if(isset($args[1])){
       $lol = $args[1];
        $player = $this->getServer()->getPlayer($lol);
}


Please make sure $args[1] is isset

is isset -> exists

i mean the isset()

this is line 122

PHP:

        $player = $this->getServer()->getPlayer($lol);