Can't use costum library

Hello,
I'm a newbie to this framework and I wanted to create a simple library and load it into a Controller.

I created a library called "GmodServerAction.php" in "Libraries":

PHP Code:

<?php
namespace App\Libraries\GmodServerAction;

class GmodServerAction {
    public function __construct()
    {

        
    }
} 


Now I'm loading it in my Home-Controller:

PHP Code:

<?php namespace App\Controllers;
use App\Libraries\GmodServerAction\GmodServerAction;

class Home extends BaseShopController
{
    public function index()
    {

        $test = new GmodServerAction();

    
        $this->render("home", $assign);
    }
} 


When I'm trying to open the Homepage it just says:

Class 'App\Libraries\GmodServerAction\GmodServerAction' not found

Any idea? (Btw I'm using XAMPP)