How to set up $ this-> cwd for symfony2 framework

I am new to symfony and I was assigned a Symfony 2 project. Now I am facing some problems with the application server / console: run.

The project is a production system, so the problem must be due to my limited knowledge within Symfony.

this is what i keep getting

proc_open() : CreateProcess failed, error code - 267 in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Process\Process.php on line 246.

      

        
        
        
      

    

line 246 is part

  $this->process = proc_open($commandline, $descriptors, $this->processPipes->pipes, $this->cwd, $this->env, $this->options);

      

        
        
        
      

    

I tried to change $ this-> cwd to "C: / xampp / htdocs / xxx", it may work, but it will have a different problem after visiting localhost: 8000, it shows this

Warning: require(app_dev.php): failed to open stream: No such file or directory in C:\xampp\xxx\vendor\symfony\symfony\src\Symfony\Bundle\FrameworkBundle\Resources\config\router_dev.php on line 30


Fatal error: require(): Failed opening required 'app_dev.php' (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Bundle\FrameworkBundle\Resources\config\router_dev.php on line 30

      

        
        
        
      

    

Any ideas what is wrong?

EDIT:

I updated all my files as my Matteo suggested, a few vendor questions popped up and I resolved it for a new one (hopefully). However, now I am stuck with another problem which is this

The given document root directory "C:/xampp/htdocs/xxx/app/../web" does not exist. 

      

        
        
        
      

    

As mentioned in the comments, I don't have a folder called "web". It has been renamed public. I have already changed the composer .json but it doesn't do anything.

{
"name": "symfony/framework-standard-edition",
"license": "MIT",
"type": "project",
"description": "The \"Symfony Standard Edition\" distribution",
"autoload": {
    "psr-0": { "": "src/" }
},
"require": {
    "php": ">=5.3.3",
    "symfony/symfony": "~2.4",
    "doctrine/orm": "~2.2,>=2.2.3",
    "doctrine/doctrine-bundle": "~1.2",
    "twig/extensions": "~1.0",
    "symfony/assetic-bundle": "~2.3",
    "symfony/swiftmailer-bundle": "~2.3",
    "symfony/monolog-bundle": "~2.4",
    "sensio/distribution-bundle": "~2.3",
    "sensio/framework-extra-bundle": "~3.0",
    "sensio/generator-bundle": "~2.3",
    "incenteev/composer-parameter-handler": "~2.0",
    "richsage/rms-push-notifications-bundle": "dev-master",
    "friendsofsymfony/user-bundle": "~1.3",
    "ircmaxell/password-compat": "~1.0.3"
},
"scripts": {
    "post-install-cmd": [
        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ],
    "post-update-cmd": [
        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ]
},
"config": {
    "bin-dir": "bin"
},
"extra": {
    "symfony-app-dir": "app",
    "symfony-web-dir": "public",
    "incenteev-parameters": {
        "file": "app/config/parameters.yml"
    },
    "branch-alias": {
        "dev-master": "2.4-dev"
    }
}
}

      

        
        
        
      

    

If I type app / console --version in cmd it shows Symfony version 2.6.1 - app / dev / debug

Please help me.