Invalid client data. Check the SOAP fault details for more information. TrackingId: f8bbc3fd-1367-448a-a4ec-9e1622759ab9

I am using https://github.com/BingAds/BingAds-PHP-SDK php sdk for getting Bing Ads data.

I use same user login that have App access and ad access also. but I don't know why this error coming. When I am try to get user then it getting error on below code :

static function GetUser($userId)
    {
        $GLOBALS['CustomerManagementProxy']->SetAuthorizationData($GLOBALS['AuthorizationData']);
        $GLOBALS['Proxy'] = $GLOBALS['CustomerManagementProxy'];

        $request = new GetUserRequest();

        $request->UserId = $userId;

        return $GLOBALS['CustomerManagementProxy']->GetService()->GetUser($request);
    }

when it gose to line :

return $GLOBALS['CustomerManagementProxy']->GetService()->GetUser($request);

it show this error:
Error is : Invalid client data. Check the SOAP fault details for more information. TrackingId: f8bbc3fd-1367-448a-a4ec-9e1622759ab9
I am using V13 of php sdk version.
Can you please Help me.