Solved Level Error

Anyone know how to fix this?
ERROR:

Code:

[05:22:13] [Server thread/CRITICAL]: TypeError: "Argument 1 passed to bedwars\LevelManager::addLevel() must be an instance of pocketmine\level\Level, null given, called in phar:///home/minecraft/plugins/BedWars v1.3.phar/src/bedwars/commands/subcommands/LevelSubcommand.php on line 64" (EXCEPTION) in "plugins/BedWars v1.3.phar/src/bedwars/LevelManager" at line 138

CODE (LevelManager):

PHP:

 /**
     * @param Level $level
     * @param string $levelName
     * @param null $data
     */
    public function addLevel(Level $level, string $levelName, $data = null) { //Line 138
        $data = is_array($data) ? $data : $this->defaultLevelData;
        $data["levelName"] = $level->getName();
        $data["folderName"] = $level->getFolderName();
        $data["name"] = $levelName;
        $this->levels[$levelName] = new BedWarsLevel($data);
    }
}

CODE (LevelSubcommand):

PHP:

case "add":
                if(!(count($args) > 2)) {
                    $sender->sendMessage(BedWars::getPrefix()."§cUsage: §7/bw level add <level> <customLevelName>");
                    break;
                }
                if(!$this->getPlugin()->getServer()->isLevelGenerated($args[1])) {
                    $sender->sendMessage(BedWars::getPrefix()."§cLevel {$args[1]} does not found!");
                    break;
                }
                if($this->getPlugin()->getLevelManager()->levelExists($args[2])) {
                    $sender->sendMessage(BedWars::getPrefix()."§cLevel {$args[2]} is already added!");
                    break;
                }
                $this->getPlugin()->getLevelManager()->addLevel($this->getPlugin()->getServer()->getLevelByName($args[1]), $args[2]); // line 64
                $sender->sendMessage(BedWars::getPrefix()."§aLevel {$args[2]} added!");
                break;

 

Anyone xd

 

PHP:

$this->getPlugin()->getServer()->getLevelByName($args[1]);


This returns null, does the level exist and is it loaded?

PHP:

Server->loadLevel($args[1]);


 

It does exists but it isnt loaded

 

Then load it

 

Now its working =)