Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Writer\BaseWriter' not found in C:\xampp\htdocs\reservation\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Writer\Xls.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\reservation\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Writer\Xls.php on line 30