Warning: chr() expects parameter 1 to be int, string given in vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php on line 1671
#0 [internal function]: __error(2, 'chr() expects p...', '/www/htdocs/w01...', 1671, Array)
#1 vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php(1671): chr('')
#2 vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php(1803): TCPDF_FONTS::unichr('', true)
#3 vendor/tecnickcom/tcpdf/include/tcpdf_fonts.php(2095): TCPDF_FONTS::UTF8ArrSubString(Array, 0, 1, true)
#4 vendor/tecnickcom/tcpdf/tcpdf.php(1960): TCPDF_FONTS::utf8Bidi(Array, '', false, true, NULL)
#5 system/modules/pdf-template/pdf_hookControl.php(117): TCPDF->__construct('P', 'mm', 'A4', true)
#6 system/modules/core/modules/ModuleArticle.php(306): pdf_hookControl->myPrintArticleAsPdf(' 
#0 vendor/tecnickcom/tcpdf/tcpdf.php(18807): __error(2, 'Illegal string ...', '/www/htdocs/w01...', 18807, Array) #1 vendor/tecnickcom/tcpdf/tcpdf.php(18278): TCPDF->openHTMLTagHandler(Array, 25, 0) #2 system/modules/pdf-template/pdf_hookControl.php(160): TCPDF->writeHTML('