Warning: require_once(config.php): Failed to open stream: No such file or directory in /var/www/html/draftfile.php on line 30

Fatal error: Uncaught Error: Failed opening required 'config.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/draftfile.php:30 Stack trace: #0 {main} thrown in /var/www/html/draftfile.php on line 30