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:
undefined method `require_gem' for main:Object
Exception class:
NoMethodError
Application root:
/web/criertower.com/releases/20070225050723
Backtrace:
# File Line Location
0 ./config/boot.rb 28
1 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
2 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 31 in `require'
3 ./config/environment.rb 8
4 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
5 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 31 in `require'
6 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 140 in `spawn_application!'
7 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 181 in `report_app_init_status'
8 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 134 in `spawn_application!'
9 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 165 in `safe_fork'
10 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 163 in `fork'
11 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 163 in `safe_fork'
12 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 130 in `spawn_application!'
13 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 165 in `safe_fork'
14 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 163 in `fork'
15 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 163 in `safe_fork'
16 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 129 in `spawn_application!'
17 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 230 in `spawn_rails_application'
18 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 213 in `synchronize'
19 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 213 in `spawn_rails_application'
20 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 122 in `spawn_application'
21 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 247 in `handle_spawn_application'
22 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 317 in `__send__'
23 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 317 in `main_loop'
24 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 168 in `start_synchronously'
25 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/bin/passenger-spawn-server 46