Appium не может взять исходный код данного приложения

Question

Я делаю автоматизацию одного настольного приложения, используя appium и node.

Я могу запустить приложение, используя node.js и получить свойства сеанса, такие как высота, ширина и c.

Но я, когда я вызываю исходный API, вот так

http://localhost: 4723 / wd / hub / session / 36bca4a c -b926-4c4f-af3b-65257888f833 / source

Я получаю ошибку от appium

{
  "status": 13,
  "value": {
    "message": "An unknown server-side error occurred while processing the command. Original error: Could not proxy. Proxy error: Could not proxy command to remote server. Original error: 500 - \"\""
  },
  "sessionId": "36bca4ac-b926-4c4f-af3b-65257888f833"
}

Пример кода:

import * as  Webdriver from 'selenium-webdriver';
import * as wd from 'wd';
let Capabilities = Webdriver.Capabilities;

(async function example() {
    let driver;
    try {
        let webdrivercapabilities = Capabilities;

        var desiredCapabilities = {
            "platformName": "Windows",
            "platformVersion": "",
            "deviceName": "WindowsPC",
            "app": "MY-APPLICATION-PASS-GOES-HERE",
            "browserName": ""
        };

        try {
            driver = new Webdriver.Builder()
                .withCapabilities(new webdrivercapabilities(desiredCapabilities))
                .usingServer('http://localhost:4723/wd/hub/')
                .build();
        } catch (error) {
        }

        driver.then(null, (err) => {
            if (err) {
                return;
            }
        });
        driver.then(() => {
            driver.getSession()
                .then(function (session) {
                    var session_id = session.getId();
                    console.log(session_id);
                    let wddriver = wd.promiseChainRemote({
                        hostname: "localhost",
                        port: "4723",
                        path: "wd/hub"
                    });
                    wddriver.attach(session_id, async (success) => {
                        let pageSource = await wddriver.source();
                        console.log(pageSource);
                    });
                });
            });
    }
    catch(e) {
        console.log(e);
    }
})();