[JSONRPC] Erreur "Unexpected "text/html" content type of the HTTP response"

Bonsoir à tous,
je travaille avec JPSON RPC pour utliser le web service du logiciel Zabbix
voici ma classe java

Code:

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// The Client sessions package
	import com.thetransactioncompany.jsonrpc2.client.*;
 
	// The Base package for representing JSON-RPC 2.0 messages
	import com.thetransactioncompany.jsonrpc2.*;
 
	// The JSON Smart package for JSON encoding/decoding (optional)
	import net.minidev.json.*;
 
	// For creating URLs
import java.net.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
 
 
	public class Exemple {
 
 
		public static void main(String[] args) {
 
 
			// Creating a new session to a JSON-RPC 2.0 web service at a specified URL
 
			// The JSON-RPC 2.0 server URL
			URL serverURL = null;
 
			try {
				serverURL = new URL("http://server/zabbix/api_jsonrpc.php");
 
			} catch (MalformedURLException e) {
			// handle exception...
			}
 
			// Create new JSON-RPC 2.0 client session
			JSONRPC2Session mySession = new JSONRPC2Session(serverURL);
 
 
			// Once the client session object is created, you can use to send a series
			// of JSON-RPC 2.0 requests and notifications to it.
 
			// Sending an example  request:
 
			// Construct new request
			String method = "user.authenticate";
			Map<String,Object> params = new HashMap<String,Object>();
			params.put("user", "user");
			params.put("password", "password");
			int requestID =1;
			JSONRPC2Request request = new JSONRPC2Request(method,params,requestID);
 
			 // Send request
			JSONRPC2Response response = null;
 
			try {
 
				response = mySession.send(request);
 
				System.out.println(response);
			} catch (JSONRPC2SessionException e) {
 
			System.err.println(e.getMessage());
			// handle exception...
			}
 
			// Print response result / error
			if (response.indicatesSuccess())
				System.out.println(response.getResult());
			else
				System.out.println(response.getError().getMessage());
 
		}
	}

j'obtient cette exception Unexpected "text/html" content type of the HTTP response
pouvez vous m'aider s'il vous plait :oops: