PHP debugging with Xdebug

I have a PHP project using XAMPP. And I try to debug with Xdebug plugin in Visual Studio Code.

The project about is a MVC framework. And on top of this framework I build a application.

So I have a folder controllers. And I have a folder Libraries within it the base controller.

But when I start Xdebug. I get this error:

Exception has occurred.
Fatal error: Uncaught Error: Class "Controller" not found in E:\Xampp\htdocs\shareposts\app\controllers\Users.php:2
Stack trace:
#0 {main}
  thrown

So I googled for this error and I found this: Fatal error: Class 'Controller' not found in php mvc

But that doesn't worked. And I can't of course put the Controller.php in the same folder as Users.php.

So this is the Users.php controller file:

<?php

require_once('Controller.php');
class Users extends Controller
{
  public function __construct()
  {
    $this->userModel = $this->model('User');
  }  
}
?>

So my question is: what I have to change?

So this is the controller class:

<?php
  /*
   * Base Controller
   * Loads the models and views
   */
  class Controller {
    // Load model
    public function model($model){
      // Require model file
      require_once '../app/models/' . $model . '.php';

      // Instatiate model
      return new $model();
    }

    // Load view
    public function view($view, $data = []){
      // Check for view file
      if(file_exists('../app/views/' . $view . '.php')){
        require_once '../app/views/' . $view . '.php';
      } else {
        // View does not exist
        die('View does not exist');
      }
    }
  }

and this is the bootstrap class. For initialising the files, when the project is starts:

<?php
  // Load Config
  require_once 'config/config.php';
  // Load Helpers
  require_once 'helpers/url_helper.php';
  require_once 'helpers/session_helper.php';

  // Autoload Core Libraries
  spl_autoload_register(function($className){
    require_once 'libraries/' . $className . '.php';
  });

and this is the launch.json file:

{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Listen for Xdebug",
      "type": "php",
      "request": "launch",
      "port": 9003
    },
    {
      "name": "Launch currently open script",
      "type": "php",
      "request": "launch",
      "program": "${file}",
      "cwd": "${fileDirname}",
      "port": 0,
      "runtimeArgs": ["-dxdebug.start_with_request=yes"],
      "env": {
        "XDEBUG_MODE": "debug,develop",
        "XDEBUG_CONFIG": "client_port=${port}"
      }
    },
    {
      "name": "Launch Built-in web server",
      "type": "php",
      "request": "launch",
      "runtimeArgs": [
        "-dxdebug.mode=debug",
        "-dxdebug.start_with_request=yes",
        "-S",
        "localhost:0"
      ],
      "program": "",
      "cwd": "${workspaceRoot}",
      "port": 9003,
      "serverReadyAction": {
        "pattern": "Development Server \\(http://localhost:8080([0-9]+)\\) started",
        "uriFormat": "http://localhost:8080%s",
        "action": "openExternally"
      }
    }
  ]
}

for example if I do this:

<?php

function test()
{
  $var = 1;
  $var++;
  return $var;
}

$hello = test();
echo $hello;

in a seperated project.

Then it works - I can debug the code.