Error XboxXASSExchangeFailure: 1306 with XboxOne Authentification

Hi,

I'm trying to send a request to connect my user to playfab but when i send it, i receive ther error 400:

XboxXASSExchangeFailure. It's not really helping so i can't see why is it happening, expetially because it was working the last week.

I have already setup single sign-on parameters with the Partner Center. I have also check my xboxlive Token, try two user test accounts on two sandboxes and try to send my token whitout the user identification part.

Can someone tell me if i can have more information about why it fail? here is my code but like i said, it worked fine before and the same code work fine on switch and PS4

public class CallRequestContainer
{
public HttpRequestState HttpState = HttpRequestState.Idle;
public System.Net.HttpWebRequest HttpRequest = null;

// This class stores the state of the request and all associated data
public string ApiEndpoint = null;
public string FullUrl = null;
public byte[] Payload = null;
public string JsonResponse = null;
public PlayFabRequestCommon ApiRequest;
public Dictionary<string, string> RequestHeaders;
public PlayFabResultCommon ApiResult;
public PlayFabError Error;
public Action DeserializeResultJson;
public Action InvokeSuccessCallback;
public Action<PlayFabError> ErrorCallback;
public object CustomData = null;

public CallRequestContainer()
{
}
}

private IEnumerator Post(CallRequestContainer reqContainer)
{

var www = new UnityWebRequest(reqContainer.FullUrl)
{
uploadHandler = new UploadHandlerRaw(reqContainer.Payload),
downloadHandler = new DownloadHandlerBuffer(),
method = "POST"
};

foreach (var headerPair in reqContainer.RequestHeaders)
{
if (!string.IsNullOrEmpty(headerPair.Key) && !string.IsNullOrEmpty(headerPair.Value))
www.SetRequestHeader(headerPair.Key, headerPair.Value);
else
Debug.LogWarning("Null header: " + headerPair.Key + " = " + headerPair.Value);
}

yield return www.SendWebRequest();

}