我在 Rails 应用程序中使用 Mail Catcher,当我尝试启动服务器或运行 rake db:migrate 时,出现以下错误。
/Users/harshamv/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.2/lib/bundler/rubygems_integration.rb:346:in `block (2 levels) in replace_gem': can't activate thin (~> 1.5.0), already activated thin-1.7.0. Make sure all dependencies are added to Gemfile. (Gem::LoadError)