Fatal error: Uncaught Error: Undefined constant "HTML2PDF_USED_TCPDF_VERSION" in /var/www/html/includes/html2pdf/_class/tcpdfConfig.php:62 Stack trace: #0 /var/www/html/includes/html2pdf/_class/myPdf.class.php(12): require_once() #1 {main} thrown in /var/www/html/includes/html2pdf/_class/tcpdfConfig.php on line 62