Zend权限RBAC /错误调用类

I'm developping an app with Zend-framework 3 which needs user's role management. I'm using zend-permission-rbac component to do so.

But i keep having an error :

File: /home/myhost/ppvc/module/User/src/Service/RbacManager.php:77

Message: Class 'Zend\Permissions\Rbac\Rbac' not found

Here's a part of the stack trace if it can help :

  • /home/myhost/ppvc/module/User/src/Service/RbacManager.php(116): User\Service\RbacManager->init()
  • /home/myhost/ppvc/module/User/src/Controller/Plugin/AccessPlugin.php(25): User\Service\RbacManager->isGranted(NULL, 'user.manage', Array)
  • [internal function]: User\Controller\Plugin\AccessPlugin->__invoke('user.manage')

This error pop when i instatiate my Rbac container for the first time :

  public function init($forceCreate = false)
{
    if ($this->rbac!=null && !$forceCreate) {
        // Already initialized; do nothing.
        return;
    }

    // If user wants us to reinit RBAC container, clear cache now.
    if ($forceCreate) {
        $this->cache->removeItem('rbac_container');
    }

    // Try to load Rbac container from cache.
    $result = false;
    $this->rbac = $this->cache->getItem('rbac_container', $result);
    if (!$result)
    {
        // Create Rbac container.
        $rbac = new Rbac();
        $this->rbac = $rbac;
.....

Also i'm calling my Rbac class correctly :

use Zend\Permissions\Rbac\Rbac;

I can't undestand where this error come from, it looks like the vendor/zend-permissions-rbac folder isn't "read" by the app. I 've updated the composer.json and composer.lock files and check them, my module is correctly called (composer.json):

"zendframework/zend-permissions-rbac": "^3.0",

I'm following this tutorial : Role-Based Access Control

Any help is welcome ! (Sorry if i made mistakes, english is not my language)

EDIT : i've checked my PHP verion for return type declarations (Because the Rbac module is full of it), but i'm in 7.2 so no problem with that.

Maxime