Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\BaseWriter" not found in /opt/lampp/htdocs/msjdocmanagement/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Html.php:39 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjdocmanagement/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Html.php on line 39