Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: YES) in /var/www/html/cdmx/scripts/connection_db.php:21 Stack trace: #0 /var/www/html/cdmx/scripts/connection_db.php(21): mysqli->__construct() #1 /var/www/html/cdmx/index.php(7): require_once('...') #2 {main} thrown in /var/www/html/cdmx/scripts/connection_db.php on line 21