问此服务的WSDL中未定义操作“”

EN

ini_set('soap.wsdl_cache_enabled', 1);

$options = array(
   'soap_version' => SOAP_1_2,
   'trace'      => true,
   'exceptions' => true,
   'encoding' => 'UTF-8',
   'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP,
   'cache_wsdl' => WSDL_CACHE_DISK,
   'login' => '****',     // <- username here, i got the right one
   'password' => '****'  // <- same
);

try{
   $client = new SoapClient('https://eigenwebsite.doorlinkenvoorraad.nl/v1/leads/deliver.html?wsdl', $options);

//var_dump($client->__getFunctions());
//echo '<br>';

$klant = array(
    "key"=>"****", // got the right one
    "klantnummer"=>"****", // got the right one
    "lead"=>"information_request",
    "testmode"=>"dummy"
);

$quote = $client->deliverLead($klant);

}catch(SoapFault $exception){
    echo $exception->getMessage();
}