Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Pdf\Core" not found in /var/www/erp/spreadsheet/src/PhpSpreadsheet/Writer/Pdf/DomPDF.php:27 Stack trace: #0 {main} thrown in /var/www/erp/spreadsheet/src/PhpSpreadsheet/Writer/Pdf/DomPDF.php on line 27