SCIM endpoint and user provisioning with Azure Active Directory & Symfony – Plesk

i’m developing a SCIM endpoint API to enable automatic provisioning of users between my symfony v5 application and Azure AD.
Actually i did not find enough documentation to help me develop this, also i am not an expert but i followed docs.microsoft for some guidelines.
i start by building a symfony REST API CRUD without using any bundle,all my endpoints start by /Users.

Then i hosted my application on a remote site (PLESK) with this url : https://example.com/
and now i want to Integrate my SCIM endpoint with the Azure AD SCIM client. In the Tenant URL field i put this URL: https://example.com/scim
but i receive this error, can anyone please explain me if i am doing the right thing ? and why i receive this error?

You appear to have entered invalid credentials. Please confirm you are
using the correct information for an administrative account. Error
code:
SystemForCrossDomainIdentityManagementCredentialValidationUnavailable
Details: We received this unexpected response from your application:
An HTTP/404 Not Found response was returned rather than the expected
HTTP/200 OK response. To address this issue, ensure that the tenant
URL is correct. The tenant URL is usually in a format like:
https://<>/scim. If this does not resolve the issue, contact the
application developer to ensure their SCIM endpoint conforms with the
protocol https://www.rfc-editor.org/rfc/rfc7644#section-3.4.2

this is my API Controller Class example create user :

class APIController extends AbstractController
{

//Create User
    /**
     * @Route("/Users", name="ajout", methods={"POST"})
     */
    public  function addUser(Request $request){
        //On verifie si on a une requette
// On vérifie si la requête est une requête Ajax
        //if($request->isXmlHttpRequest()) {
        // On instancie un nouvel article
        $user = new User();

        // On décode les données envoyées
        $donnees = json_decode($request->getContent());

        // On hydrate l'objet
        $user->setEmail($donnees->email);
        $user->setRoles($donnees->roles);

        // On sauvegarde en base
        $entityManager = $this->getDoctrine()->getManager();
        $entityManager->persist($user);
        $entityManager->flush();

        // On retourne la confirmation
        return new Response('ok', 201);
    }
    //return new Response('Failed', 404); }
}