soapclient can not open https - php

I have been trying for days to solve this problem I saw it several times in consultations and they do not give a solution. this is the error message and this code

  

Warning: SoapClient :: SoapClient () [soapclient.soapclient]: I / O   warning: failed to load external entity   " link " in   C: \ AppServ \ www \ wsdl \ index.php on line 4

my code is

 $client = new SoapClient('https://ws5.pide.gob.pe/services/ReniecConsultaDni?WSDL');
var_dump($client->__getFunctions());

I also did the test with nusoap

    require_once('lib/nusoap.php');
$wsdl="https://ws5.pide.gob.pe/services/ReniecConsultaDni?wsdl";
$client=new nusoap_client($wsdl, true);
$param=array('nuDniConsulta'=>'xxx','nuDniUsuario'=>'xxx','nuRucUsuario'=>'20xxx','password'=>'xxx');
$dni = $client->call('consultar',$param);
header("Content-Type:text/html");
// hacemos la impresion de informacion
print_r ($dni);

resultado

    Array
(
    [faultcode] => ns0:Server
    [faultstring] => HV000116: The object to be validated must not be null.
)

If someone could guide me to the web service I get normal with soapui and with visual studio but with php is my problem.