KillCash what error

hi guys!

I need a hand to solve the problem of this plugin.

Code:

21:35:01 [WARNING] RuntimeException: "yaml_parse(): end of stream reached without finding document 0" (E_WARNING) in "/src/pocketmine/utils/Config" at line 137
21:35:01 [INFO] Disabling KillCash v1.0.0
21:35:01 [INFO] [KillCash] KillCash Error!

PHP:

<?php


namespace Praxthisnovcht\KillCash;

use pocketmine\Player;
use pocketmine\Server;
use pocketmine\plugin\PluginBase;
use pocketmine\utils\TextFormat;
use pocketmine\utils\Config;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerDeathEvent;
use pocketmine\event\entity\EntityDamageByEntityEvent;

use MassiveEconomy\MassiveEconomyAPI;
use onebone\economyapi\EconomyAPI;

class Main extends PluginBase implements Listener{

    public $massive;
    public $ecnomy;

public function onLoad() {
    $this->getLogger()->info(TextFormat::LIGHT_PURPLE . "Loading KillCash v1.0.0");
    $this->getLogger()->info(TextFormat::LIGHT_PURPLE . "Seeks Plugins To Load Plugins");
}
    public function onEnable(){
        @mkdir($this->getDataFolder());
        $this->saveDefaultConfig();
        $cfg = $this->getConfig();
     
     
        if(!$cfg->exists("Give_Money")){
            $cfg->set("Give_Money", "50");

        }
        if(!$cfg->exists("Message")){
            $cfg->set("Message", "You have received [{Money} $]");
        }
        $cfg->save();
        $cfg->reload();

        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        $this->getLogger()->info(TextFormat::LIGHT_PURPLE . "Enabled KillCash");
     
     
     
        if(!$this->getServer()->getPluginManager()->getPlugin("MassiveEconomy") == false) {
            $massive = Server::getInstance()->getPluginManager()->getPlugin("MassiveEconomy");
            $this->log ( TextFormat::GREEN . "- KillCash - Loaded With MassiveEconomy !" ); 
            $this->economy = true;         
            }else{
            $this->getLogger()->info(TextFormat::YELLOW."MassiveEconomy not connect to KillCash");
            $this->massive = false;
            } 
        if(!$this->getServer()->getPluginManager()->getPlugin("EconomyAPI") == false) {
            $ecnomy = Server::getInstance()->getPluginManager()->getPlugin("EconomyAPI");
            $this->log ( TextFormat::GREEN . "- KillCash - Loaded With EconomyAPI !" );
            $this->economy = true;
            }else{
            $this->getLogger()->info(TextFormat::YELLOW."EconomyAPI not connect to KillCash");
            $this->economy = false;
        }
    }

    public function onPlayerDeath(PlayerDeathEvent $event){
        if($this->economy) {
               $entity = $event->getEntity();
            $cause = $entity->getLastDamageCause();
            if($cause instanceof EntityDamageByEntityEvent) {
                $killer = $cause->getDamager()->getPlayer();
                            $message = str_replace("{Money}", $this->cfg("Give_Money"), $this->cfg("Message"));
                                        EconomyAPI::getInstance()->addMoney($killer->getName(), $this->cfg->get("Give_Money"));
                    return true;
                }
            }
        if($this->massive) {
               $entity = $event->getEntity();
            $cause = $entity->getLastDamageCause();
            if($cause instanceof EntityDamageByEntityEvent) {
                $killer = $cause->getDamager()->getPlayer();
                            $message = str_replace("{Money}", $this->cfg("Give_Money"), $this->cfg("Message"));
                                        MassiveEconomyAPI::getInstance()->payPlayer($killer->getName(), $this->cfg("Give_Money"));
                    return true;
                }
            }else{
                return true;
            }
    }
    public function onDisable(){
        $this->getLogger()->info(TextFormat::RED."KillCash Error!");
    }
}


https://github.com/Praxthisnovcht/KillCash/blob/master/src/Praxthisnovcht/KillCash/Main.php

Your default config is corrupted.

Rewrite

How can i fix it? :

WARNING RuntimeException: "yaml_parse(): reading error encountered during parsing: invalid leading UTF-8 octet (line 1, column 1)" (E_WARNING) in "/src/pocketmine/utils/Config" at line 138 pls help me