Error:

No PDF has been generated.
Command:

/usr/bin/wkhtmltopdf http://www.ssi-schaefer.pl/typo3temp/hd_SO6EPK.html /webroot/html/ssi_cms/production-a/htdocs/typo3temp/hd_ZqyZ3Y  --footer-left http://www.ssi-schaefer.pl/ssi-schaefer/odpowiedzialnosc-wzgledem-srodowiska.html --footer-font-name Arial --footer-font-size 9 2> /webroot/html/ssi_cms/production-a/htdocs/typo3temp/se_0mHsid

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

Loading pages (1/5)
[>                                                           ] 0%
[======>                                                     ] 10%
[============================================================] 100%
Error: Failed loading page http://www.ssi-schaefer.pl/typo3temp/hd_SO6EPK.html