Fix bug.

app/controllers/admin/announcements_controller.rb

@@ -28,7 +28,7 @@ class Admin::AnnouncementsController < OrbitAdminController
   def update_sort_setting
     setting = @announcement_setting
     setting.update_attributes(settings_params)
-    if defined?(OrbitHelper::SharedHash)
+    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
       OrbitHelper::SharedHash['announcement'][:enable_manually_sort] = setting.enable_manually_sort
     end
     redirect_to edit_sort_admin_announcement_path

app/controllers/announcements_controller.rb

@@ -9,7 +9,7 @@ class AnnouncementsController < ApplicationController
   end
 
   def manually_sort
-    if defined?(OrbitHelper::SharedHash)
+    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
       OrbitHelper::SharedHash['announcement'][:enable_manually_sort] rescue AnnouncementSetting.first.enable_manually_sort
     else
       AnnouncementSetting.first.enable_manually_sort rescue false