First run preproduction deployment through the Tools app.
Change env variables in config/config2.php using the preprod sql values.
Verify classnames in modules/site/pages/index.php after the require_once.
// for instance, change:
$postNeg = new Post();
// to:
$postNeg = new PostDados();
Check the database PDO connexion in classes/dados/database.php
// change:
new PDO('mysql:unix_socket=' . SYSTEM_DB_HOST ...
// to:
new PDO('mysql:host=' . SYSTEM_DB_HOST ...
Modify /config/config2.php to fix paths for assets