Report is not a constructor Error

Why am I getting this error: Report is not a constructor. I have the package installed. I am trying to render a PDF with node and serve it to my client via http.

const express = require('express');
const db = require('../config/db');
const router = new express.Router();
const PDFDocument =  require('pdfkit') 
const Report = require('fluentreports')

var fs = require("fs")


router.get('/getpdf', (req, res) => {
  res.type('application/pdf');
   // Our Simple Data in Object format: 
  var data = [{name: 'Elijah', age: 18}, {name: 'Abraham', age: 22}, {name: 'Gavin', age: 28}];
  
  // Create a Report   
  var rpt = new Report("Report.pdf")        
        .pageHeader( ["Employee Ages"] )      // Add a simple (optional) page Header...         
        .data( data )               // Add some Data (This is required) 
        .detail( [['name', 200],['age', 50]]) // Layout the report in a Grid of 200px & 50px 
        .render();                    // Render the Report (required if you want output...) 








   

  });

module.exports = router;

via Tzvetlin Velev