how to fix Fatal error: Uncaught Error: Class 'Adldap\Adldap\Configuration\DomainConfiguration' not found in /var/www/html/comptes/ad/comptes.php:6

Apparently, there is a problem in my php code, but I can't figure it out

<?php
require_once __DIR__.'/../../vendor/autoload.php';
use Adldap\Adldap;
use Adldap\Utilities;

$config= new Adldap\Configuration\DomainConfiguration([
     'hosts' => [
              'my host domain',
      ],
]);

$ad = new \Adldap\Adldap();
$ad->addProvider($config);