app.js code comparison because ejs not working - express

Question

I'm using express.js and ejs.
I will post below two codes for the app.js file. The thing is that ejs and layout.ejs do not work with the one of those two codes, but it works perfectly with the other
Here are the two codes:
The first one, which ejs is working:
const express = require('express');
const expressLayouts = require('express-ejs-layouts');
const path = require('path')
const app = express();
// Bodyparser
app.use(express.urlencoded({extended:false}));
/// EJS
app.use(expressLayouts);
app.set('view engine', 'ejs');
//PUBLIC FOLDER(css and js)
app.use(express.static(path.join(__dirname,'/public')));
// Express body parser
app.use(express.urlencoded({ extended: true }));
// Routes
app.use('/', require('./routes/index.js'));
app.use('/users', require('./routes/users.js'));
const PORT = process.env.PORT || 5000;
app.listen(PORT, console.log(`Server started on port ${PORT}`));
and the second one, which ejs is not working:
const express = require('express');
const app = express();
const PORT = process.env.PORT || 5000;
const expressLayouts = require('express-ejs-layouts');
const mongoose = require('mongoose');
const path = require('path')
// Bodyparser
app.use(express.urlencoded({extended:false}));
//ROUTES
app.use('/', require('./routes/index'))
app.use('/users', require('./routes/users'))
// EJS
app.use(expressLayouts);
app.set('view engine', 'ejs');
app.set('view options', { layout:'layout.ejs' });
//PUBLIC FOLDER(css and js)
app.use(express.static(path.join(__dirname,'/public')));
//DB CONFIG
const db = require('./config/keys').MongoURI;
// //Connect to mongo
mongoose.connect(db, {
useNewUrlParser: true,
useUnifiedTopology: true
}).then( () => console.log('MongoDB Connected...'))
.catch( err => console.log(err));
app.listen(PORT, console.log(`Server started on PORT ${PORT}`));
I'm trying to figure out what's the issue with the second code and doesn't make the ejs work. Can anyone have a quick glimpse and compare these two and tell me what's the problem? Thank you for your time