Fatal error: Uncaught Error: Interface 'Dompdf\Canvas' not found in /home/kingelearn/public_html/vendor/dompdf/dompdf_old/src/Adapter/PDFLib.php:34
Stack trace:
#0 {main}
thrown in /home/kingelearn/public_html/vendor/dompdf/dompdf_old/src/Adapter/PDFLib.php on line 34