Fatal error: Uncaught Error: Class "PHPExcel_Exception" not found in C:\xampp\htdocs\BK\bateriasec\vendor\phpoffice\phpexcel\Classes\PHPExcel\Calculation\Exception.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BK\bateriasec\vendor\phpoffice\phpexcel\Classes\PHPExcel\Calculation\Exception.php on line 28