Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in C:\xampp\htdocs\php-sscdms\classes\DBConnection.php:18 Stack trace: #0 C:\xampp\htdocs\php-sscdms\classes\DBConnection.php(18): mysqli->__construct('localhost', 'root', '', 'sscdms_db') #1 C:\xampp\htdocs\php-sscdms\classes\SystemSettings.php(8): DBConnection->__construct() #2 C:\xampp\htdocs\php-sscdms\classes\SystemSettings.php(247): SystemSettings->__construct() #3 C:\xampp\htdocs\php-sscdms\config.php(9): require_once('C:\\xampp\\htdocs...') #4 C:\xampp\htdocs\php-sscdms\index.php(1): require_once('C:\\xampp\\htdocs...') #5 {main} thrown in C:\xampp\htdocs\php-sscdms\classes\DBConnection.php on line 18