Redmine

Yesterday I have migrate Redmine 0.8.6 to 0.8.7. After that I didn't check all the pages.. I have just few page randomly and its works fine. After that I have installed CODE REVIEW plugin. That also installed successfully. After that whenever i navigate to Project Setting page its throwing "Internal Error"

*Internal error

An error occurred on the page you were trying to access.
If you continue to experience problems please contact your redMine administrator for assistance.*

This is Log Status
vendor/plugins/haru_iida-redmine_code_review-29dd4d294476/lib/code_review_projects_helper_patch.rb:35:in `project_settings_tabs_without_code_review'
vendor/plugins/haru_iida-redmine_code_review-29dd4d294476/lib/code_review_projects_helper_patch.rb:35:in `project_settings_tabs_without_code_review'
vendor/plugins/haru_iida-redmine_code_review-29dd4d294476/lib/code_review_projects_helper_patch.rb:35:in `project_settings_tabs'
app/views/projects/settings.rhtml:3:in `_run_erb_47app47views47projects47settings46rhtml'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/base.rb:342:in `send'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/base.rb:342:in `execute'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/template_handlers/compilable.rb:29:in `send'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/template_handlers/compilable.rb:29:in `render'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/template.rb:35:in `render'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/template.rb:22:in `render_template'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_view/base.rb:248:in `render_file'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:1112:in `render_for_file'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:845:in `render_with_no_layout'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/layout.rb:251:in `render_without_benchmark'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/benchmarking.rb:51:in `render'
/home/redmine/.gem/ruby/1.8/gems/activesupport-2.1.2/lib/active_support/core_ext/benchmark.rb:8:in `realtime'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/benchmarking.rb:51:in `render'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:1161:in `default_render'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:1167:in `perform_action_without_filters'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/filters.rb:579:in `call_filters'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/filters.rb:572:in `perform_action_without_benchmark'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/rescue.rb:201:in `perform_action_without_caching'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/caching/sql_cache.rb:13:in `perform_action'
/home/redmine/.gem/ruby/1.8/gems/activerecord-2.1.2/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'
/home/redmine/.gem/ruby/1.8/gems/activerecord-2.1.2/lib/active_record/query_cache.rb:8:in `cache'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/caching/sql_cache.rb:12:in `perform_action'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:529:in `send'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:529:in `process_without_filters'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/filters.rb:568:in `process_without_session_management_support'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/session_management.rb:130:in `process'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/base.rb:389:in `process'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/dispatcher.rb:149:in `handle_request'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/dispatcher.rb:107:in `dispatch'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/dispatcher.rb:104:in `synchronize'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/dispatcher.rb:104:in `dispatch'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/dispatcher.rb:120:in `dispatch_cgi'
/home/redmine/.gem/ruby/1.8/gems/actionpack-2.1.2/lib/action_controller/dispatcher.rb:35:in `dispatch'
/home/redmine/.gem/ruby/1.8/gems/rails-2.1.2/lib/webrick_server.rb:112:in `handle_dispatch'
/home/redmine/.gem/ruby/1.8/gems/rails-2.1.2/lib/webrick_server.rb:78:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
/home/redmine/.gem/ruby/1.8/gems/rails-2.1.2/lib/webrick_server.rb:62:in `dispatch'
/home/redmine/.gem/ruby/1.8/gems/rails-2.1.2/lib/commands/servers/webrick.rb:66
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
/home/redmine/.gem/ruby/1.8/gems/activesupport-2.1.2/lib/active_support/dependencies.rb:510:in `require'
/home/redmine/.gem/ruby/1.8/gems/activesupport-2.1.2/lib/active_support/dependencies.rb:355:in `new_constants_in'
/home/redmine/.gem/ruby/1.8/gems/activesupport-2.1.2/lib/active_support/dependencies.rb:510:in `require'
/home/redmine/.gem/ruby/1.8/gems/rails-2.1.2/lib/commands/server.rb:39
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
script/server:3

Rendering /opt/redmine-0.8.7/public/500.html (500 Internal Server Error)

Please let me know how to resolve this..