undefined method `highlight'

Created by: dtolj

After creating a new project, it shows an error 500. Project was created but whenever I navigate to its page, I get 500 error.

I am using python 2.6.6 on RHEL 6 i386

Completed 500 Internal Server Error in 7ms

ActionView::Template::Error (undefined method `highlight' for nil:NilClass):
    7: git config --global user.email  "#{current_user.email}"
    8: eos
    9: %>
    10:     <%= raw bash_lexer.highlight(setup_str) %>
    11:     <br />
    12:     <br />
    13:     <h2>Next steps:</h2>
  app/views/projects/empty.html.erb:10:in `_app_views_projects_empty_html_erb___460979452__619384988'
  app/controllers/projects_controller.rb:66:in `show'