Fatal error: Uncaught Error: Class 'PHPExcel_Shared_File' not found in C:\xampp\htdocs\cottonSQL\Classes\PHPExcel\Shared\ZipArchive.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\cottonSQL\Classes\PHPExcel\Shared\ZipArchive.php on line 4