将gemset ruby-2.0.0-p247中的ruby版本更新为ruby-2.2.4。
现在当我启动服务器时出现错误
There was an error while trying to load the gem 'breadcrumbs_on_rails'. (Bundler::GemRequireError)
Gem Load Error is: private method `alias_method' called for ActionController::Base:Class
我该如何解决这个问题？