Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xlsx\WriterPart" not found in /home/rwebserver/public_html/mmei/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/RelsRibbon.php:9
Stack trace:
#0 {main}
thrown in /home/rwebserver/public_html/mmei/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/RelsRibbon.php on line 9