React server side rendering unable to import jsx files

Question

I am using react server side rendering with node to generate pdf.

I have 3 files

index.js, PDF.jsx, helper.jsx

index.js contains following code.

let fileContent = await Fsp.readFile('PDF.jsx', 'utf-8');
let code = Babel.transform(fileContent, {
  presets: ['@babel/preset-env', '@babel/preset-react'],
  comments: false,
  minified: true
}).code;

PDF.jsx contains following import

import * as Helper from './Helper.jsx';

Helper.jsx contains following code

class Helper{
}
export default Helper;

But it gives following error

export default Helper;
^^^^^^
SyntaxError: Unexpected token export
    at Module._compile (internal/modules/cjs/loader.js:723:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)