[BUG] Cannot access API with developer token

[mykhailohoy]

I want to use evernote sandbox with my developer token. I copy-paste the code from the docs:

const Evernote = require("evernote");

var developerToken = "S=here-is-my-dev-token1234";
 
var client = new Evernote.Client({token: developerToken});

// Set up the NoteStore client 
var noteStore = client.getNoteStore();
 
// Make API calls
noteStore.listNotebooks(function(notebooks) {
  for (var i in notebooks) {
    console.log("Notebook: " + notebooks[i].name);
  }
});

It throws an exception:
Access to fetch at 'https://sandbox.evernote.com//edam/user' from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
POST https://sandbox.evernote.com//edam/user net::ERR_FAILED

So does the code in the README of this repository:

const Evernote = require("evernote");

var developerToken = "S=here-is-my-dev-token1234";
 
var client = new Evernote.Client({token: developerToken});
var userStore = client.getUserStore();
userStore.getUser().then(function(user) {
  console.log(user);
});

system: Windows 10
node: 12.16.3
npm: 16.14.4
evernote module: 2.0.5