In production server (ubuntu 14.04) getting this error while PDF download
referred link and tried
https://gist.github.com/brunogaspar/bd89079245923c04be6b0f92af431c10
$ wkhtmltopdf http://www.google.com google.pdf
/usr/local/rvm/gems/ruby-2.5.1/gems/wkhtmltopdf-binary-0.12.4/bin/wkhtmltopdf_linux_x86: 1: /usr/local/rvm/gems/ruby-2.5.1/gems/wkhtmltopdf-binary-0.12.4/bin/wkhtmltopdf_linux_x86: Syntax error: word unexpected (expecting ")")
any help?