安装Refinery CMS时出错 - 会员引擎

Question

我正在Ubuntu 10.04中的Rails 3上运行Refinery CMS。我已经安装了博客引擎，一切运行正常...但后来我尝试安装会员引擎，它似乎从管理面板工作正常（我看到菜单，我可以调整不同的东西），但当我去到主页我收到以下错误信息，在内容页面第8行：

undefined local variable or method `page_title' for #<#<Class:0xb54b5194>:0xb54b41f4>
  5:   # if 'sections' is passed in as a local_assigns, all of this is ignored.
  6:   if local_assigns[:sections].blank?
  7:     # always have a title
  8:     sections = [{:yield => :body_content_title, :fallback => page_title, :title => true}]
  9: 
  10:     # append sections from this page.
  11:     @page.parts.inject(sections) do |s, part|