Failed to auto loading the routes.php

PHP Code:

// My Autoload
public $psr4 = [
    APP_NAMESPACE => APPPATH, // For custom app namespace
    'Config'      => APPPATH . 'Config',
    'Myth\Auth'   => APPPATH . 'ThirdParty/myth-auth/src',
    'Acme'        => ROOTPATH . 'acme',
];

// My Controller
// Location : ROOTPATH . 'acme/Home/Controllers'
namespace Acme\Home\Controllers;

use App\Controllers\BaseController;

class Test extends BaseController
{
   public function index()
   {
       echo "string";
   }
}

// My Route
// Location : ROOTPATH . 'acme/Home/Config'
$routes->get('test', '\Acme\Home\Controllers\Test::index');

// And the result is
// Controller or its method is not found: \App\Controllers\Test::index 


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For now, it's okay for me because I use MVC instead. But I'll try to check later with a fresh CodeIgniter4