Thanks so much for helping out. I was close to pulling my hair.
Funny thing is, I get this error even without providing the file path. i.e.
root@ss-app:/var/www/discourse# pwd /var/www/discourse root@ss-app:/var/www/discourse# RAILS_ENV=production ruby script/import_scripts/disqus.rb ….. ….. /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:37: warning: already initialized constant Nokogiri::XML::ParseOptions::DTDATTR /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:37: warning: previous definition of DTDATTR was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:39: warning: already initialized constant Nokogiri::XML::ParseOptions::DTDVALID /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:39: warning: previous definition of DTDVALID was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:41: warning: already initialized constant Nokogiri::XML::ParseOptions::NOERROR /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:41: warning: previous definition of NOERROR was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:43: warning: already initialized constant Nokogiri::XML::ParseOptions::NOWARNING /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:43: warning: previous definition of NOWARNING was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:45: warning: already initialized constant Nokogiri::XML::ParseOptions::PEDANTIC /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:45: warning: previous definition of PEDANTIC was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:47: warning: already initialized constant Nokogiri::XML::ParseOptions::NOBLANKS /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:47: warning: previous definition of NOBLANKS was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:49: warning: already initialized constant Nokogiri::XML::ParseOptions::SAX1 /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:49: warning: previous definition of SAX1 was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:51: warning: already initialized constant Nokogiri::XML::ParseOptions::XINCLUDE /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:51: warning: previous definition of XINCLUDE was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:53: warning: already initialized constant Nokogiri::XML::ParseOptions::NONET /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:53: warning: previous definition of NONET was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:55: warning: already initialized constant Nokogiri::XML::ParseOptions::NODICT /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:55: warning: previous definition of NODICT was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:57: warning: already initialized constant Nokogiri::XML::ParseOptions::NSCLEAN /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:57: warning: previous definition of NSCLEAN was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:59: warning: already initialized constant Nokogiri::XML::ParseOptions::NOCDATA /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:59: warning: previous definition of NOCDATA was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:61: warning: already initialized constant Nokogiri::XML::ParseOptions::NOXINCNODE /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:61: warning: previous definition of NOXINCNODE was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:63: warning: already initialized constant Nokogiri::XML::ParseOptions::COMPACT /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:63: warning: previous definition of COMPACT was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:65: warning: already initialized constant Nokogiri::XML::ParseOptions::OLD10 /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:65: warning: previous definition of OLD10 was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:67: warning: already initialized constant Nokogiri::XML::ParseOptions::NOBASEFIX /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:67: warning: previous definition of NOBASEFIX was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:69: warning: already initialized constant Nokogiri::XML::ParseOptions::HUGE /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:69: warning: previous definition of HUGE was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:72: warning: already initialized constant Nokogiri::XML::ParseOptions::DEFAULT_XML /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:72: warning: previous definition of DEFAULT_XML was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:74: warning: already initialized constant Nokogiri::XML::ParseOptions::DEFAULT_HTML /usr/local/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/parse_options.rb:74: warning: previous definition of DEFAULT_HTML was here /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax/parser.rb:33:in `<class:Parser>': superclass mismatch for class Attribute (TypeError) from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax/parser.rb:32:in `<module:SAX>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax/parser.rb:3:in `<module:XML>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax/parser.rb:2:in `<module:Nokogiri>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax/parser.rb:1:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax.rb:3:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml/sax.rb:3:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml.rb:3:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri/xml.rb:3:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri.rb:36:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.8.1/lib/nokogiri.rb:36:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/loofah-2.1.1/lib/loofah.rb:3:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/loofah-2.1.1/lib/loofah.rb:3:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/rails-html-sanitizer-1.0.3/lib/rails-html-sanitizer.rb:2:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/rails-html-sanitizer-1.0.3/lib/rails-html-sanitizer.rb:2:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/sanitize_helper.rb:2:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/sanitize_helper.rb:2:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/text_helper.rb:32:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/text_helper.rb:32:in `<module:TextHelper>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/text_helper.rb:29:in `<module:Helpers>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/text_helper.rb:6:in `<module:ActionView>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/text_helper.rb:4:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_tag_helper.rb:18:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_tag_helper.rb:18:in `<module:FormTagHelper>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_tag_helper.rb:14:in `<module:Helpers>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_tag_helper.rb:8:in `<module:ActionView>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_tag_helper.rb:6:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_helper.rb:4:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers/form_helper.rb:4:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers.rb:50:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers.rb:50:in `<module:Helpers>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers.rb:4:in `<module:ActionView>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/actionview-5.1.4/lib/action_view/helpers.rb:3:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/context.rb:7:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/context.rb:7:in `<module:Context>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/context.rb:6:in `<module:Rails>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/context.rb:5:in `<module:Sprockets>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/context.rb:4:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/railtie.rb:7:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/railtie.rb:7:in `<top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/railties-5.1.4/lib/rails/all.rb:14:in `require' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/railties-5.1.4/lib/rails/all.rb:14:in `block in <top (required)>' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/railties-5.1.4/lib/rails/all.rb:12:in `each' from /var/www/discourse/vendor/bundle/ruby/2.4.0/gems/railties-5.1.4/lib/rails/all.rb:12:in `<top (required)>' from /var/www/discourse/config/application.rb:2:in `require' from /var/www/discourse/config/application.rb:2:in `<top (required)>' from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /var/www/discourse/config/environment.rb:2:in `<top (required)>' from /var/www/discourse/script/import_scripts/base.rb:14:in `require_relative' from /var/www/discourse/script/import_scripts/base.rb:14:in `<top (required)>' from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require' from script/import_scripts/disqus.rb:3:in `<main>'
Nevertheless, here are the top 20 lines
root@ss-app:/tmp# sed -n -e '1,20p' disqus-export.xml <?xml version="1.0" encoding="utf-8"?> <disqus xmlns="http://disqus.com" xmlns:dsq="http://disqus.com/disqus-internals" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://disqus.com/api/schemas/1.0/disqus.xsd http://disqus.com/api/schemas/1.0/disqus-internals.xsd"> <category dsq:id="7345180"> <forum>https-name-com</forum> <title>General</title> <isDefault>true</isDefault> </category> <thread dsq:id="6275518016"> <id /> <forum>https-www-name-com</forum> <category dsq:id="7345180" /> <link>https://www.name.com/tea-recipe</link> <title>Tea</title> <message /> <createdAt>2013-06-15T10:30:49Z</createdAt> <author> <email>email@gmail.com</email> <name>Name Redacted</name> <isAnonymous>false</isAnonymous> <username>disqus_IU5cREKDJ4</username>