sending an XML to a web service using PHP soapclient with certification I get a 404

I am dealing with a web service that wants me to use a certificate and sample XML to contact them. I decided to use SOAPclient although I don't really have much understanding of it. My script looks like this:

$url='http://ift.tt/1nd8GlG';
$cert = "CERTIFICATE.pem";
$xmlDocument = '<soapenv:Envelope xmlns:com="http://ift.tt/YlEHfo" xmlns:data="http://ift.tt/1nd8J0I" xmlns:soapenv="http://ift.tt/sVJIaE">
   <soapenv:Header></soapenv:Header>
   <soapenv:Body wsu:Id="id-1" xmlns:wsu="http://ift.tt/Hm2joJ">
      <com:getNameID>
         <com:objaInfo>
            <data:firstName>Larry</data:firstName>
         </com:objaInfo>
      </com:getPreScreenOffers>
   </soapenv:Body>
</soapenv:Envelope>';

ini_set("soap.wsdl_cache_enabled", "0");
$client = new SoapClient($url,
        array(
            'local_cert'=>$cert,
            'trace' => 1,
            'encoding' => 'ISO-8859-1',
            'cache_wsdl' => WSDL_CACHE_MEMORY
        )
);

$xmlvar = new SoapVar(
      "<ns1:xmlDocument>'.$xmlDocument.'</ns1:xmlDocument>", XSD_ANYXML 
);
enter code here
$params->xmlDocument = (object)$xmlvar;
$save_result = $client->SaveProduct($params);
print_r($save_result);

When I do this I get:

Warning: SoapClient::SoapClient(http://ift.tt/1nd8GlG) [soapclient.soapclient]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /path/to/script.php on line 56.

Warning: SoapClient::SoapClient() [soapclient.soapclient]: I/O warning : failed to load external entity "http://ift.tt/1nd8GlG" in /path/to/script.php on line 56

Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://ift.tt/1nd8GlG' : failed to load external entity "http://ift.tt/1nd8GlG" in /path/to/script.php:56 Stack trace: #0 /path/to/script.php(56): SoapClient->SoapClient('https://the.websi...', Array) #1 {main} thrown in /path/to/script.php on line 56

I'm pretty sure I shouldn't be getting a 404 here. What are first things I should check to troubleshoot?