fix error

app/helpers/admin/application_forms_helper.rb

@@ -10,7 +10,7 @@ module Admin::ApplicationFormsHelper
     
     pages.each do |page|
       if page.categories.count ==1
-        if page.categories.include?(application_form.category.id.to_s)
+        if page.categories.include?(application_form.category.id.to_s) rescue false
           ann_page = page
         end
       end
@@ -19,7 +19,7 @@ module Admin::ApplicationFormsHelper
 
     if ann_page.nil?
        pages.each do |page|
-        if page.categories.include?(application_form.category.id.to_s)
+        if page.categories.include?(application_form.category.id.to_s) rescue false
           ann_page = page
         end
         break if !ann_page.nil?