Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Reader\Xlsx\BaseParserClass" not found in C:\xampp\htdocs\UP_Distribution\pds_dfpd_up\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xlsx\ColumnAndRowAttributes.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\UP_Distribution\pds_dfpd_up\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xlsx\ColumnAndRowAttributes.php on line 11