Fatal error: Uncaught Mpdf\MpdfException: Invalid input characters. Did you set $mpdf->in_charset properly? in /var/www/html/pdf/vendor/mpdf/mpdf/src/Mpdf.php:25970
Stack trace:
#0 /var/www/html/pdf/vendor/mpdf/mpdf/src/Mpdf.php(13133): Mpdf\Mpdf->purify_utf8('<!doctype html>...', false)
#1 /var/www/html/pdf/report.php(165): Mpdf\Mpdf->WriteHTML('<!doctype html>...')
#2 {main}
thrown in /var/www/html/pdf/vendor/mpdf/mpdf/src/Mpdf.php on line 25970