Fatal error: Uncaught mysqli_sql_exception: Connection refused in /var/www/html/inc/db.php:9
Stack trace:
#0 /var/www/html/inc/db.php(9): mysqli_connect()
#1 /var/www/html/index.php(13): include('...')
#2 {main}
thrown in /var/www/html/inc/db.php on line 9