Redmine

Dear all,
In order to support plug-in, after upgrading from 1.8.7 to version 1.9.3 version, the configuration page not open cast 500 error.Change ruby to 1.9.2 or so,is this how to handle.

ruby -v
ruby 1.9.2p320 (2012-04-20 revision 35421) [x86_64-linux]

tail -f log/production.log
Started GET "/admin" for 192.168.1.18 at 2013-08-19 17:05:04 +0800
Processing by AdminController#index as HTML
Current user: sword (id=4)
Rendered admin/_menu.html.erb (5.1ms)
Rendered admin/index.html.erb within layouts/admin (5.7ms)
Rendered layouts/base.html.erb (11.8ms)
Completed 200 OK in 24ms (Views: 17.4ms | ActiveRecord: 2.3ms)
Started GET "/settings" for 192.168.1.18 at 2013-08-19 17:05:07 +0800
Processing by SettingsController#index as HTML
Current user: sword (id=4)
Rendered settings/_general.html.erb (8.0ms)
Rendered settings/_display.html.erb (7.8ms)
Rendered settings/_authentication.html.erb (5.7ms)
Rendered settings/_projects.html.erb (10.5ms)
Rendered common/_tabs.html.erb (39.8ms)
Rendered settings/edit.html.erb within layouts/admin (40.4ms)
Completed 500 Internal Server Error in 47ms

ActionView::Template::Error (incompatible character encodings: ASCII-8BIT and UTF-8):
21: </script>
22:
23: <% tabs.each do |tab| >
24: <= content_tag('div', render(:partial => tab[:partial], :locals => {:tab => tab} ),
25: :id => "tab-content#{tab[:name]}",
26: :style => (tab[:name] != selected_tab ? 'display:none' : nil),
27: :class => 'tab-content') %>
app/views/common/_tabs.html.erb:24:in `block in app_views_common_tabs_html_erb__4046057004198103457_51144240'
app/views/common/_tabs.html.erb:23:in `each'
app/views/common/_tabs.html.erb:23:in `_app_views_common__tabs_html_erb__4046057004198103457_51144240'
app/helpers/application_helper.rb:271:in `render_tabs'
app/views/settings/edit.html.erb:3:in `_app_views_settings_edit_html_erb___3437158674120265598_51525740'
app/controllers/settings_controller.rb:28:in `index'