Could not run command xvfb-run -a --server-args="-screen 0, 1024x768x24" /usr/local/bin/wkhtmltopdf '--no-outline' '--margin-top' '10' '--margin-right' '10' '--margin-bottom' '10' '--margin-left' '10' '--encoding' 'UTF-8' '--disable-smart-shrinking' '--use-xserver' '--enable-local-file-access' '/var/www/html/upload/tmp/tmp_wkhtmlto_pdf_44YYIP.html' '/var/www/html/upload/tmp/tmp_wkhtmlto_pdf_rMm4UM.pdf'