The exit status code '127' says something went wrong: stderr: "sh: /usr/local/bin/wkhtmltopdf: No such file or directory " stdout: "" command: /usr/local/bin/wkhtmltopdf --lowquality '/tmp/knp_snappy6307762c52e7e3.78484403.html' '/tmp/knp_snappy6307762c52ed34.92502863.pdf'.
