How to load local csv datasource while using puppeteer

Following the guide shared here: https://github.com/flexmonster/pivot-puppeteer/blob/master/pivot.js
I want to make the following changes to pivot.js, 
setReport({
  dataSource: {
    filename: // add local object here from my device
  }
});
 
Currently while using the flexmonster CDN package (index.html is using the following include statements),
<script src="https://cdn.flexmonster.com/flexmonster.js"></script>
componentFolder: "https://cdn.flexmonster.com/"
 
The problem I face with this is that using the cdn packages I will have to host my data online. So I made the Following changes:
 
<script src="node_modules/flexmonster/flexmonster.js"></script>
componentFolder: "node_modules/flexmonster/"
 
I added local installation of flexmonster using node_modules and added my data source csv to this path "node_modules/flexmonster/". However, in this approach puppeteer was unable to detect my flexmonster package generating error upon creating New flexmonster object in index.html. 
To tackle this I added following code to pivot.js:
 
const browser = await puppeteer.launch({ headless: false }); /* Launching the headless browser */
const page = await browser.newPage(); /* Creating a new page */
page.setJavaScriptEnabled(true); // to enable javascript using puppeteer
var filepath = path.join(__dirname, "./node_modules/flexmonster/flexmonster.js");
await page.addScriptTag({ path: require.resolve(filepath) }); // to add script path
 
This change allowed my local flexmonster installation to be detected however generates the following error as shown in console screenshot attached in files.
Kindly guide me on how to resolve this issue of loading a local csv using puppeteer. Thanks for any help in advance!