32 Chart read write PDF

Load Test from Xlsx file 36writeLineChart1.xlsx
Iterate worksheets looking at the charts
Worksheet: Data
chart1 - "Sales"

lineChart

Fatal error: Uncaught Error: Class "Mpdf\Mpdf" not found in /home/ihlamberhl/devcnja/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php:22 Stack trace: #0 /home/ihlamberhl/devcnja/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php(43): PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf->createExternalWriterInstance(Array) #1 /home/ihlamberhl/devcnja/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Helper/Sample.php(132): PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf->save('/tmp/phpspreads...') #2 /home/ihlamberhl/devcnja/samples/Chart/32_Chart_read_write_PDF.php(84): PhpOffice\PhpSpreadsheet\Helper\Sample->write(Object(PhpOffice\PhpSpreadsheet\Spreadsheet), '/tmp/phpspreads...', Array, true) #3 {main} thrown in /home/ihlamberhl/devcnja/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php on line 22