Warning: require_once(../App/1/Model/Core/header.php): Failed to open stream: No such file or directory in /var/www/html/index.php on line 24

Fatal error: Uncaught Error: Failed opening required '../App/1/Model/Core/header.php' (include_path='.:/usr/share/php') in /var/www/html/index.php:24 Stack trace: #0 {main} thrown in /var/www/html/index.php on line 24