Error on PDF Export

Hi there,

Using the PDF Export I get the following Warning:

Warning: chr() expects parameter 1 to be int, string given in /EXAMPLE/htdocs/wp-content/plugins/job-postings/tcpdf/include/tcpdf_fonts.php on line 1671

Warning: Cannot modify header information - headers already sent by (output started at /EXAMPLE/htdocs/wp-content/plugins/job-postings/tcpdf/include/tcpdf_fonts.php:1671) in /EXAMPLE/htdocs/wp-content/plugins/job-postings/tcpdf/tcpdf.php on line 7646
TCPDF ERROR: Some data has already been output to browser, can't send PDF file

I searched and saw, that this seems to happen many times.
Can’t get any solution for me.

Need some help
Thank’s
Bernd

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