Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Writer\Pdf' not found in /opt/lampp/htdocs/kuesioner/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php:9 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php on line 9