Fatal error: Uncaught Error: Undefined constant "PHPEXCEL_ROOT" in /home/politec/public_html/migracion/humana/assets/excel/Classes/PHPExcel/Autoloader.php:73 Stack trace: #0 /home/politec/public_html/migracion/humana/assets/excel/Classes/PHPExcel/Autoloader.php(36): PHPExcel_Autoloader::Load('PHPExcel_Shared...') #1 {main} thrown in /home/politec/public_html/migracion/humana/assets/excel/Classes/PHPExcel/Autoloader.php on line 73