Getting nonexistent ‘Allow-Access-Allow-Origin’ header problem in nodejs application with express

I’m getting the “No ‘Access-Control-Allow-Origin’ problem” and tried some solutions that doesn’t worked for me.

Tried solutions:

app.use(cors({origin: '*', credentials: true}));

app.use((req, res, next) => {
    // Website you wish to allow to connect
    res.setHeader('Access-Control-Allow-Origin', '*');

    // Request methods you wish to allow
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');

    // Request headers you wish to allow
    res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');

    // Set to true if you need the website to include cookies in the requests sent
    // to the API (e.g. in case you use sessions)
    res.setHeader('Access-Control-Allow-Credentials', true);

    // Pass to next layer of middleware
    next();
});

My code:

app.js

'use strict';

const express = require('express');
const bodyParser = require('body-parser');
const usersRoute = require('./routers/users-route');
const cors = require('cors');


const app = express();

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));

app.use('/store', usersRoute);

app.use(express.static('public'));

app.use(cors({origin: '*', credentials: true}));

module.exports = app;

server.js

'use strict';

const http = require('http');
const debug = require('debug')('nodejsservers:server');

const app = require('../src/app');

const port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

const server = http.createServer(app);


server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

console.log('API rodando na porta: ' + port);

function normalizePort(val){
    const port = parseInt(val, 10);

    if(isNaN(port)) return val;
    if(port >= 0) return port;
    return false;
}

function onError(error){
    if(error.syscall !== 'listen') throw error;

    const bind = typeof port === 'string' ? 'Pipe ' + port :  'Port ' + port;

    switch(error.code){
        case 'EACCES':
            console.error(`${bind} requires elevated privileges`);
            process.exit(1);
            break;
        case 'EADDRINUSE':
            console.error(`${bind} is already in use`);
            process.exit(1);
            break;
        default: 
            throw error;
    }
}

function onListening(){
    const addr = server.address();
    const bind = typeof addr === 'string' ? 'pipe ' + addr : 'port ' + addr.port;
    debug('Listening on ' + bind);
}