Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /home/rwebserver/public_html/operations/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php:48
Stack trace:
#0 {main}
thrown in /home/rwebserver/public_html/operations/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Workbook.php on line 48