XenForo Import Failing (config/application.rb:2)

Product Support
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Massive thank you for the help @mpalmer. I really appreciate it!

discourse@titan-app:/var/www/discourse$ bundle exec ruby script/import_scripts/xenforo.rb
DEPRECATION WARNING: Sprockets method `register_engine` is deprecated.
Please register a mime type using `register_mime_type` then
use `register_compressor` or `register_transformer`.
https://github.com/rails/sprockets/blob/master/guides/extending_sprockets.md#supporting-all-versions-of-sprockets-in-processors
 (called from <top (required)> at /var/www/discourse/lib/es6_module_transpiler/sprockets.rb:3)
/usr/local/lib/ruby/2.3.0/fileutils.rb:1392:in `initialize': No such file or directory @ rb_sysopen - /usr/local/lib/ruby/gems/2.3.0/gems/ember-data-source-2.3.0.beta.5/dist/ember-data.js (Errno::ENOENT)
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:1392:in `open'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:1392:in `copy_file'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:486:in `copy_file'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:403:in `block in cp'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:1571:in `block in fu_each_src_dest'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:1587:in `fu_each_src_dest0'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:1569:in `fu_each_src_dest'
        from /usr/local/lib/ruby/2.3.0/fileutils.rb:402:in `cp'
        from /usr/local/lib/ruby/gems/2.3.0/gems/ember-rails-0.18.5/lib/ember_rails.rb:68:in `block in <class:Railtie>'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/initializable.rb:30:in `instance_exec'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/initializable.rb:30:in `run'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/initializable.rb:55:in `block in run_initializers'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:347:in `each'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:347:in `call'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
        from /usr/local/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/initializable.rb:54:in `run_initializers'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/application.rb:352:in `initialize!'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/railtie.rb:194:in `public_send'
        from /usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.7.1/lib/rails/railtie.rb:194:in `method_missing'
        from /var/www/discourse/config/environment.rb:5: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 script/import_scripts/xenforo.rb:3:in `require'
        from script/import_scripts/xenforo.rb:3:in `<main>'

It looks like now that I am missing gems or something needs to be defined..

Kind regards,