Отправка POST запроса при работе с API сайта https://poeditor.com

package project;
 
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
 
import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
 
public class Main {
    public static void main(String[] args) {
 
        try {
            String response = Translate.getResponse("ru", "en", jsonString);
 
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
 
    }
}

package project;
import java.net.*;
import java.io.*;
 
public class Translate {
    static String response;
    private static String token = "468d4876717a79082b0adfb82c706d58";
    public static String getResponse(String lang, String translateLang, String jsonString){
        //response = executePost("https://api.poeditor.com/v2/projects/list","api_token=468d4876717a79082b0adfb82c706d58");
        //System.out.println(response);
 
 
        response = executePost("https://api.poeditor.com/v2/languages/add","api_token="+token+"&id=193758"+"&language="+lang);
        System.out.println(response);
        response = executePost("https://api.poeditor.com/v2/languages/add","api_token="+token+"&id=193758"+"&language="+translateLang);
        System.out.println(response);
        response = executePost("https://api.poeditor.com/v2/projects/upload","api_token="+token+"&id=193758"+"&updating=translations"+"&file=@/home/isps3/Downloads/json_file_sample.json"+"&language="+translateLang);// <<-- ошибка здесь
        System.out.println(response);
 
 
        return "";
    }
 
 
    private static String executePost(String targetURL, String urlParameters) {
        HttpURLConnection connection = null;
 
        try {
            //Create connection
            URL url = new URL(targetURL);
            connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Type",
                    "application/x-www-form-urlencoded");
 
            connection.setRequestProperty("Content-Length",
                    Integer.toString(urlParameters.getBytes().length));
            connection.setRequestProperty("Content-Language", "en-US");
 
            connection.setUseCaches(false);
            connection.setDoOutput(true);
 
            //Send request
            DataOutputStream wr = new DataOutputStream (
                    connection.getOutputStream());
            wr.writeBytes(urlParameters);
            wr.close();
 
            //Get response
            InputStream is = connection.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(is));
            StringBuilder response = new StringBuilder(); // or StringBuffer if Java version 5+
            String line;
            while ((line = rd.readLine()) != null) {
                response.append(line);
                response.append('\r');
            }
            rd.close();
            return response.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        } finally {
            if (connection != null) {
                connection.disconnect();
            }
        }
    }
}