Error: 404 Not Found while sending fax javascript

Hello,

I'm using Sending Fax Demo code and receiving an error while sending a fax.

Error: 404 Not Found

Here is the code I am using.

const RC = require('@ringcentral/sdk').SDK
const http = require('https')

RECIPIENT = '+17...13'

RINGCENTRAL_CLIENTID = 'MY_ID'
RINGCENTRAL_CLIENTSECRET = 'MY_SECRET'
RINGCENTRAL_SERVER = 'https://platform.devtest.ringcentral.com'

RINGCENTRAL_USERNAME = '+142...46'
RINGCENTRAL_PASSWORD = 'MY_PASSWORD'
RINGCENTRAL_EXTENSION = '101'

var rcsdk = new RC( {server: RINGCENTRAL_SERVER, clientId: RINGCENTRAL_CLIENTID, clientSecret: RINGCENTRAL_CLIENTSECRET} );
var platform = rcsdk.platform();

platform.login( {username: RINGCENTRAL_USERNAME, password: RINGCENTRAL_PASSWORD, extension: RINGCENTRAL_EXTENSION} )

platform.on(platform.events.loginSuccess, function(e){
  send_fax()
});

async function send_fax() {
  var FormData = require('form-data');
  formData = new FormData();
  var body = {
    to: [{'phoneNumber': RECIPIENT}],
    faxResolution: 'High',
    coverPageText: "This is a demo Fax page from Node JS"
  }

  formData.append('json', new Buffer.from(JSON.stringify(body)), {
    filename: 'request.json',
    contentType: 'application/json'
  });

  formData.append('attachment', require('fs').createReadStream('logo.jpeg'));

  try {
    var resp = await platform.post('/account/~/extension/~/fax', formData)
    var jsonObj = await resp.json()
    console.log("FAX sent. Message status: " + jsonObj.messageStatus)
  } catch(e) {
    console.log(e.message)
  }
}

Here is the detailed error.

Error: 404 Not Found
    at Client.<anonymous> (/Users/irfan/Desktop/Projects/Node/ring-central/node_modules/@ringcentral/sdk/lib/http/Client.js:115:35)
    at step (/Users/irfan/Desktop/Projects/Node/ring-central/node_modules/@ringcentral/sdk/lib/http/Client.js:56:23)
    at Object.next (/Users/irfan/Desktop/Projects/Node/ring-central/node_modules/@ringcentral/sdk/lib/http/Client.js:37:53)
    at fulfilled (/Users/irfan/Desktop/Projects/Node/ring-central/node_modules/@ringcentral/sdk/lib/http/Client.js:28:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5) {
  response: Response {
    size: 0,
    timeout: 0,
    [Symbol(Body internals)]: { body: [PassThrough], disturbed: false, error: null },
    [Symbol(Response internals)]: {
      url: 'https://platform.devtest.ringcentral.com/account/~/extension/~/fax',
      status: 404,
      statusText: 'Not Found',
      headers: [Headers],
      counter: 0
    }
  },
  request: Request {
    size: 0,
    timeout: 0,
    follow: 20,
    compress: true,
    counter: 0,
    agent: undefined,
    originalBody: FormData {
      _overheadLength: 317,
      _valueLength: 117,
      _valuesToMeasure: [Array],
      writable: false,
      readable: true,
      dataSize: 0,
      maxDataSize: 2097152,
      pauseStreams: true,
      _released: true,
      _streams: [],
      _currentStream: null,
      _insideLoop: false,
      _pendingNext: false,
      _boundary: '--------------------------513479819697878242582314',
      _events: [Object: null prototype],
      _eventsCount: 1
    },
    [Symbol(Body internals)]: { body: [FormData], disturbed: false, error: null },
    [Symbol(Request internals)]: {
      method: 'POST',
      redirect: 'follow',
      headers: [Headers],
      parsedURL: [Url],
      signal: null
    }
  },
  originalMessage: 'Response has unsuccessful status'
}