Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Reader\XlsBase" not found in D:\xampp\htdocs\SSWPOS\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xls.php:63 Stack trace: #0 {main} thrown in D:\xampp\htdocs\SSWPOS\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xls.php on line 63