Error:

No PDF has been generated.
Command:
/usr/bin/wkhtmltopdf http://www.ssi-schaefer.de/typo3temp/hd_eTxcvh.html /webroot/html/ssi_cms/production-a/htdocs/typo3temp/hd_Pyppds  --footer-left http://www.ssi-schaefer.de/en/conveying-and-picking/references/printingpaper/wepa.html --footer-font-name Arial --footer-font-size 9 2> /webroot/html/ssi_cms/production-a/htdocs/typo3temp/se_bFvCVC

This is the (stderr) output of the executed command: