Fatal error: Uncaught Error: Class "PHPExcel_Style_Supervisor" not found in C:\xampp\htdocs\reporteGabriel\PHPExcel-1.8\Classes\PHPExcel\Style\Alignment.php:27 Stack trace: #0 {main} thrown in C:\xampp\htdocs\reporteGabriel\PHPExcel-1.8\Classes\PHPExcel\Style\Alignment.php on line 27