Fatal error: Uncaught Error: Undefined constant "PHPEXCEL_ROOT" in D:\laragon\laragon\www\old\1 sept titulo\titulo\plugins\PHPExcel\Autoloader.php:49 Stack trace: #0 D:\laragon\laragon\www\old\1 sept titulo\titulo\plugins\PHPExcel\Autoloader.php(29): PHPExcel_Autoloader::Load('PHPExcel_Shared...') #1 {main} thrown in D:\laragon\laragon\www\old\1 sept titulo\titulo\plugins\PHPExcel\Autoloader.php on line 49