Ruby on Rails application could not be started

These are the possible causes:
  • There may be a syntax error in the application's code. Please check for such errors and fix them.
  • A required library may not installed. Please install all libraries that this application requires.
  • The application may not be properly configured. Please check whether all configuration files are written correctly, fix any incorrect configurations, and restart this application.
  • A service that the application relies on (such as the database server or the Ferret search engine server) may not have been started. Please start that service.
Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem.
Error message:
uninitialized constant ActionController::AbstractRequest
Exception class:
NameError
Application root:
/var/www/redmine
Backtrace:
# File Line Location
0 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 440 in `load_missing_constant'
1 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 80 in `const_missing'
2 /var/www/redmine/vendor/plugins/actionwebservice/lib/action_web_service/protocol/abstract.rb 74
3 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
4 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `require'
5 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 158 in `require'
6 /var/www/redmine/vendor/plugins/actionwebservice/lib/action_web_service/protocol.rb 1
7 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
8 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `require'
9 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 158 in `require'
10 /var/www/redmine/vendor/plugins/actionwebservice/lib/action_web_service.rb 46
11 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
12 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `require'
13 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 158 in `require'
14 /var/www/redmine/vendor/plugins/actionwebservice/init.rb 1 in `evaluate_init_rb'
15 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb 158 in `evaluate_init_rb'
16 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb 11 in `silence_warnings'
17 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb 154 in `evaluate_init_rb'
18 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb 48 in `load'
19 /var/www/redmine/config/../vendor/plugins/engines/lib/engines/plugin.rb 44 in `load'
20 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb 38 in `load_plugins'
21 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb 37 in `each'
22 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb 37 in `load_plugins'
23 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 369 in `load_plugins'
24 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 165 in `process'
25 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 113 in `send'
26 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 113 in `run'
27 /var/www/redmine/config/environment.rb 20
28 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
29 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb 31 in `require'
30 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/railz/application_spawner.rb 299 in `preload_application'
31 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/railz/application_spawner.rb 248 in `initialize_server'
32 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/utils.rb 255 in `report_app_init_status'
33 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/railz/application_spawner.rb 233 in `initialize_server'
34 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server.rb 194 in `start_synchronously'
35 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server.rb 163 in `start'
36 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/railz/application_spawner.rb 209 in `start'
37 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/spawn_manager.rb 262 in `spawn_rails_application'
38 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server_collection.rb 126 in `lookup_or_add'
39 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/spawn_manager.rb 256 in `spawn_rails_application'
40 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server_collection.rb 80 in `synchronize'
41 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize'
42 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/spawn_manager.rb 255 in `spawn_rails_application'
43 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/spawn_manager.rb 154 in `spawn_application'
44 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/spawn_manager.rb 287 in `handle_spawn_application'
45 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server.rb 352 in `__send__'
46 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server.rb 352 in `main_loop'
47 /var/lib/gems/1.8/gems/passenger-2.2.7/lib/phusion_passenger/abstract_server.rb 196 in `start_synchronously'
48 /var/lib/gems/1.8/gems/passenger-2.2.7/bin/passenger-spawn-server 61