"You will need to run whktmltopdf within a "virutal" X server" error when being executed within crontab job

I am getting an exception when my script is being executed by crontab job:

You will need to run whktmltopdf within a "virutal" X server.
Go to the link above for more information
https://github.com/JazzCore/python-pdfkit/wiki/Using-wkhtmltopdf-without-X-serverUse exit() or Ctrl-D (i.e. EOF) to exit

If I run the script manually - it works and saves html to pdf. So of course I did that magic which is written in the URL above. But it doesn’t help when script is executed within crontab (root user)

Debian 7

[svscorp]

Some investigation:

1. I checked the arguments PDFKit is calling wkhtmltopdf with that way (from string, btw, that’s why 3rd argument is ‘-’):

['/usr/bin/wkhtmltopdf', '--quiet', '-', '497479169.pdf']

1. With https://github.com/JazzCore/python-pdfkit/wiki/Using-wkhtmltopdf-without-X-server We are making the shortcut in /usr/bin/wkhtmltopdf.sh and then the symlink here: ln -s /usr/bin/wkhtmltopdf.sh /usr/local/bin/wkhtmltopdf
2. When cron is executing the python script, even a simple one

#!/usr/bin/python3

import pdfkit

options = {
    'quiet': ''
}

print('start')
pdfkit.from_url('http://google.com', '/tmp/google.pdf', options=options)
print('stop')

PDFKit is calling /usr/bin/wkhtmltopdf when is being executed from CRON. When it is executed from command line it uses our shortcut /usr/local/bin/wkhtmltopdf

[JazzCore]

Should be fixed now, closing