Redmine

For the past few weeks (ever since a Ruby update) I've been unable to do anything with my Projects. I am still able to view my Home and Administrative panels, but every time I try to view a Project I get an "Internal Error".

The CLI output (from Redmine launch up to and including the error) is as follows:

/usr/lib/ruby/gems/2.2.0/gems/activesupport-3.2.21/lib/active_support/values/time_zone.rb:270: warning: circular argument reference - now
=> Booting WEBrick
=> Rails 3.2.21 application starting in production on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2015-02-07 01:40:15] INFO  WEBrick 1.3.1
[2015-02-07 01:40:15] INFO  ruby 2.2.0 (2014-12-25) [x86_64-linux]
[2015-02-07 01:40:15] INFO  WEBrick::HTTPServer#start: pid=20177 port=3000
/usr/lib/ruby/gems/2.2.0/gems/activerecord-3.2.21/lib/active_record/associations/has_many_association.rb:53: warning: circular argument reference - reflection
/usr/lib/ruby/gems/2.2.0/gems/activerecord-3.2.21/lib/active_record/associations/has_many_association.rb:57: warning: circular argument reference - reflection
/usr/lib/ruby/gems/2.2.0/gems/activerecord-3.2.21/lib/active_record/associations/has_many_association.rb:61: warning: circular argument reference - reflection
/usr/lib/ruby/gems/2.2.0/gems/activerecord-3.2.21/lib/active_record/associations/has_many_association.rb:80: warning: circular argument reference - reflection
Started GET "/" for 127.0.0.1 at 2015-02-07 01:40:18 -0500
Processing by WelcomeController#index as HTML
  Current user: robert (id=5)
  Rendered welcome/index.html.erb within layouts/base (62.0ms)
Completed 200 OK in 178.8ms (Views: 103.4ms | ActiveRecord: 19.9ms)
Started GET "/projects/test" for 127.0.0.1 at 2015-02-07 01:40:20 -0500
Processing by ProjectsController#show as HTML
  Parameters: {"id"=>"test"}
  Current user: robert (id=5)
  Rendered projects/_members_box.html.erb (0.4ms)
  Rendered projects/_sidebar.html.erb (1.3ms)
  Rendered projects/show.html.erb within layouts/base (12.2ms)
Completed 500 Internal Server Error in 113.2ms

ActionView::Template::Error (undefined method `name' for nil:NilClass):
    42:     <% end %>
    43: 
    44:     <h1><%= page_header_title %></h1>
    45: 
    46:     <% if display_main_menu?(@project) %>
    47:     <div id="main-menu">
    48:         <%= render_main_menu(@project) %>
  lib/redmine.rb:246:in `block (2 levels) in <top (required)>'
  lib/redmine/menu_manager.rb:199:in `call'
  lib/redmine/menu_manager.rb:199:in `allowed_node?'
  lib/redmine/menu_manager.rb:166:in `block in menu_items_for'
  lib/redmine/menu_manager.rb:165:in `each'
  lib/redmine/menu_manager.rb:165:in `menu_items_for'
  lib/redmine/menu_manager.rb:90:in `render_menu'
  lib/redmine/menu_manager.rb:80:in `render_main_menu'
  app/views/layouts/base.html.erb:45:in `_app_views_layouts_base_html_erb__3144639456856195886_69943781430900'
  app/controllers/projects_controller.rb:163:in `show'

I launch it using this desktop shortcut:

#!/bin/bash

cd /usr/share/webapps/redmine
sudo ruby script/rails server webrick -e production

I am running Arch Linux (up-to-date) and followed the ArchWiki instructions for a single-user, non-RVM installation. It has worked fine for nearly 6 months now, up until 2-3 weeks ago when Ruby updated. Since then I haven't been able to use the glory that is Redmine.

I am not a Ruby guy, else I would be more helpful.