node.js - Why this error coming while running nodejs server?

I am getting this error while running nodejs Server

Error: Not Found

    at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13
    at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5)
    at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13)
    at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7
    at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12)
    at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10)
    at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15
    at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14)
    at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3)
    at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12)

     var express = require('express');
    var path = require('path');
    var favicon = require('serve-favicon');
    var logger = require('morgan');

    var cookieParser = require('cookie-parser');
    var bodyParser = require('body-parser');
    var routes = require('./routes/index');
    var users = require('./routes/users');
    var app = express();
    // view engine setup
    app.set('views', path.join(__dirname, 'views'));
    app.set('view engine', 'jade');
    // uncomment after placing your favicon in /public
    //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));

    app.use(logger('dev'));
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: false }));
    app.use(cookieParser());
    app.use(express.static(path.join(__dirname, 'public')));
    app.use('/', routes);
    app.use('/users', users);
    // catch 404 and forward to error handler
    app.use(function(req, res, next) {
      var err = new Error('Not Found');

      err.status = 404;
      next(err);
    });
    // error handlers
    // development error handler
    // will print stacktrace
    if (app.get('env') === 'development') {
      app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {

          message: err.message,
          error: err
        });
      });
    }
    // production error handler
    // no stacktraces leaked to user
    app.use(function(err, req, res, next) {
      res.status(err.status || 500);
      res.render('error', {

        message: err.message,
        error: {}
      });
    });
    module.exports = app;

Answer

Finally, It's working. I am still seeing that "not found" error in http://localhost:3000. But everything is working fine. I have used another computer to do this. Just did the following.

npm install express

npm install

npm start

nodejs, git server should haven been installed in our machine.