Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in /home/urmitech/public_html/chatting-app/apply_indexes_simple.php:8 Stack trace: #0 /home/urmitech/public_html/chatting-app/apply_indexes_simple.php(8): mysqli->__construct('localhost', 'root', Object(SensitiveParameterValue), 'chatting_app_db') #1 {main} thrown in /home/urmitech/public_html/chatting-app/apply_indexes_simple.php on line 8