Fatal error: Uncaught TypeError: chr(): Argument #1 ($codepoint) must be of type int, string given in /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf/tcpdf.php:6890
Stack trace:
#0 /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf/tcpdf.php(6890): chr('')
#1 /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf/tcpdf.php(6838): TCPDF->unichr('')
#2 /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf/tcpdf.php(13502): TCPDF->UTF8ArrSubString(Array)
#3 /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf/tcpdf.php(1784): TCPDF->utf8Bidi(Array, '')
#4 /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf.php(56): TCPDF->__construct('P', 'mm', 'A4', true)
#5 {main}
  thrown in /home/httpd/vhosts/werbe-tech.ch/httpdocs/cms/pdf/tcpdf.php on line 6890