Fatal error: Uncaught Error: Class "core\App" not found in /var/www/html/clases24_25/CorreccionExamenDic/EXAMENChema/start.php:3 Stack trace: #0 {main} thrown in /var/www/html/clases24_25/CorreccionExamenDic/EXAMENChema/start.php on line 3