After upgrading to version 18, forms having PDF form data feature are not working, showing following error:
This page isn’t working
dlc.co.in is currently unable to handle this request.
HTTP ERROR 500
Error Log Showing:
[14-May-2022 21:29:07 Asia/Kolkata] PHP Deprecated: strtolower(): Passing null to parameter #1 ($string) of type string is deprecated in /home/vqypfnmd/public_html/form/includes/helper-functions.php on line 3062
[14-May-2022 21:29:07 Asia/Kolkata] PHP Fatal error: Uncaught Error: Call to undefined function Dompdf\mb_internal_encoding() in /home/vqypfnmd/public_html/form/lib/dompdf/src/Dompdf.php:323
Stack trace:
#0 /home/vqypfnmd/public_html/form/lib/dompdf/src/Dompdf.php(295): Dompdf\Dompdf->setPhpConfig()
#1 /home/vqypfnmd/public_html/form/includes/helper-functions.php(966): Dompdf\Dompdf->__construct(Object(Dompdf\Options))
#2 /home/vqypfnmd/public_html/form/includes/post-functions.php(3276): mf_send_notification(Object(PDO), 1, 20588, 'support@forensi...', Array)
#3 /home/vqypfnmd/public_html/form/view.php(37): mf_process_form(Object(PDO), Array)
#4 {main}
thrown in /home/vqypfnmd/public_html/form/lib/dompdf/src/Dompdf.php on line 323
If I disable Attach Completed Form Data as PDF File in Notification Settings then it works well... please suggest