Cannot execute sample code - error when calling `getticker`

I'm getting an error when running the sample code. Specifically, I get an error in the hmac-sha512.js file, when calling getticker (the first API call, getmarketsummaries, works well):

C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\hmac-sha512.js:24
(function(){var a=CryptoJS,j=a.enc.Utf8;a.algo.HMAC=a.lib.Base.extend({init:function(a,b){a=this._hasher=new a.init;"string"==typeof b&&(b=j.parse(b));var f=a.blockSize,l=4*f;b.sigBytes>l&&(b=a.finalize(b));b.clamp();for(var u=this._oKey=b.clone(),k=this._iKey=b.clone(),m=u.words,y=k.words,z=0;z<f;z++)m[z]^=1549556828,y[z]^=909522486;u.sigBytes=k.sigBytes=l;this.reset()},reset:function(){var a=this._hasher;a.reset();a.update(this._iKey)},update:function(a){this._hasher.update(a);return this},finalize:function(a){var b=

                                                                         ^

TypeError: Cannot read property 'sigBytes' of undefined
    at new init (C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\hmac-sha512.js:24:178)
    at Object.HmacSHA512 (C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\hmac-sha512.js:12:488)    at setRequestUriGetParams (C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\node.bittrex.api.js:97:38)
    at publicApiCall (C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\node.bittrex.api.js:154:53)
    at Object.getticker (C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\node.bittrex.api.js:343:7)
    at bittrex.getmarketsummaries (C:\Users\User\Code\bittrex\index.js:16:13)
    at Request._callback (C:\Users\User\Code\bittrex\node_modules\node-bittrex-api\node.bittrex.api.js:144:11)
    at Request.self.callback (C:\Users\User\Code\bittrex\node_modules\request\request.js:186:22)
    at Request.emit (events.js:159:13)
    at Request.<anonymous> (C:\Users\User\Code\bittrex\node_modules\request\request.js:1163:10)

I'm running the code on a Windows 10 machine. With minor changes, it's exactly the same as the sample:

const bittrex = require('node-bittrex-api');
const settings = require('./settings');

bittrex.options({
  'apikey': settings.apikey,
  'apisecret': settings.apisecret,
  'verbose': true
});

console.log('here');

bittrex.getmarketsummaries((data, err) => {
  if(err) {
    return console.error(err);
  }
  for(var i in data.result) {
    console.log(data.result[i].MarketName);
    bittrex.getticker({market: data.result[i].MarketName}, (ticker, err2) => {
      if(err) {
        return console.error(err2);
      }
      console.log(ticker);
    });
  }
});

What am I doing wrong?

PS: just verified I'm getting the exact same error when calling getbalance or any other method that requires authentication.

dparlevliet / node.bittrex.api

Cannot execute sample code - error when calling `getticker` #82