Warning: require_once(./config/loader.php): Failed to open stream: No such file or directory in /var/www/html/index.php on line 12

Fatal error: Uncaught Error: Failed opening required './config/loader.php' (include_path='.:/usr/local/lib/php:/var/www/html') in /var/www/html/index.php:12 Stack trace: #0 {main} thrown in /var/www/html/index.php on line 12