Nusoap não funciona no Laravel 5.6

Eu instalei o nusoap no laravel 5.6 e estou tentando conectar meu client SOAP com o meu server SOAP. Eu instalei o package no composer "require econea/nusoap-dev-develop".

A minha rota é essa:

Route::get('/client','SOAP\ClientController@client');
Route::any('/server','SOAP\ServidorController@server');

	Esse é o meu ClienteController:

use App\Http\Controllers\Controller;
use nusoap_client;

class ClientController extends Controller
{public function client()
{

 $client = new nusoap_client('http://localhost:8080/index.php/server?wsdl');

 $response = $client->call('get_price','book');
 if ($client->fault) {
 echo "<h2>Fault</h2><pre>";
 print_r($response);
 echo "</pre>";
 } else {
 $error = $client->getError();
 if ($error) {
 echo "<h2>Error</h2><pre>" . $error . "</pre>";
 } else {
 echo "<h2>Main</h2>";
 echo $response;
 }
 }
}
}

	Este é o meu ServerController:

use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Response;
use nusoap_server;

class ServidorController extends Controller
{public function server()
{

$server = new nusoap_server(); // Create a instance for nusoap server

$server->configureWSDL("Soap Demo", "urn:soapdemo"); // Configure WSDL file

$server->register(
"get_price", // name of function
array("name" => "xsd:string"), // inputs
array("return" => "xsd:integer") // outputs

 );
 function get_price($name)
 {
 $products = [
 "book" => 20,
 "pen" => 10,
 "pencil" => 5
 ];

 foreach ($products as $product => $price) {
 if ($product == $name) {
 return $price;
 break;
 }
 }
 }

 return Response::make($server->service(file_get_contents("php://input")),
 200, array('Content-Type' => 'text/xml; charset=ISO-8859-1'));
}
}

	E essa é a reposta do meu servidor:

HTTP/1.0 419 unknown status
Host: 127.0.0.1:8080
Date: Tue, 08 May 2018 20:00:16 +0000
Connection: close
X-Powered-By: PHP/7.1.17-1+ubuntu16.04.1+deb.sury.org+1
Cache-Control: no-cache, private
date: Tue, 08 May 2018 20:00:16 GMT
Content-Type: text/html; charset=UTF-8
pragma: no-cache
expires: -1
Set-Cookie: laravel_session=eyJpdiI6ImlIemsxYzZnVWFhZDlxdEh5Q2FSU3c9PSIsInZhbHVlIjoiVjBkbFBXams1NGcyS1E3dlIrXC9hZ1BkXC9cLzdmTGlTa2NzVWxxS3RlK0o3aCtMM0lKaUxIbWxmRGc3SGdCWlM4bzYrSlMyMlhKelhiZEE4NU5rN3FVM0E9PSIsIm1hYyI6ImZkZmU1YjlmMWMwNTFlNGQ4NmMyMGViYTVhNWYxMjBiZGFkODcxMWI1Njg2NTRjMTQzMWQ4OTlkZTQ4MWVjM2UifQ%3D%3D; expires=Tue, 08-May-2018 22:00:16 GMT; Max-Age=7200; path=/; HttpOnly

Error Response not of type text/xml: text/html; charset=UTF-8

Eu estou usando a porta 8080 pro servidor e a porta 8000 pro client.

Obrigado.