Error rendering list with Pug and ExpressJS

Hello I am fairly new to Node, express, and pug I am trying to render an object to a view and I am receiving a pug error, Or at least I think it is a pug error. I am using the pugcli and when it tries to render the html I get an error.

The pugcli error is displayed on the terminal as:

Cannot read property 'length' of undefined

This is strange because when I try to view it in the browser even though the pug cli shows an error the browser shows a list but with all the <li> elements empty.

I want the <li> to display the objects id, name,and age

I understand that in pug in order to render an object you have to iterate through it with a for loop of some kind. I have written that in the pug file but the objects do not render.

I would appreciate help about what I am missing in the code or if I completely screwed up the code somehow?

My setup is at follows

bin/www
public
   javascripts
   stylesheets
routes
   index.js
views
   index.pug
   layout.pug
   ...
app.js

My index.pug is:

extends layout
block content
  h1= title
  p Welcome to #{appHeading}
  div
    ul
      for user, i in users
        li= users.name +" - "+ users.id
      li=number

This is my index.js is:

var express = require('express');
var router = express.Router();
var users = [
  {
    id: 0,
    name: 'Glenn',
    age: 40
  },
  {
    id: 1,
    name: 'Jeff',
    age: 37
  },
  {
    id: 2,
    name: 'Sara',
    age: 22
  },
  {
    id: 3,
    name: 'Bill',
    age: 41
  },
  {
    id: 4,
    name: 'Mary',
    age: 29
  },

];
var appHeading = 'my object render app ' 
var number = 42;
/* GET home page. */
router.get('/', function(req, res, next) {

  //res.json(users);
  //res.send('Is this working?')
  res.render('index', { 
    title: 'This is my app to render objects in pug',
    users,
    number,
    appHeading
  });
});
module.exports = router;

and My app.js is:

const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const bodyParser = require('body-parser');

const indexRouter = require('./routes/index.js');
const usersRouter = require('./routes/users.js');

const app = express();

/*const logging = function(req, res, next){
  console.log('Logging....')
  next();
}
*/
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(logger('dev'));
//Body Parser middleware
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended : false}));
//app.use(express.json());
//app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
//app.use(logging);
app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});


app.listen(port=3000 , function(){
  console.log('Server started on port '+ port);
})
module.exports = app;