I ran into an error while setting up a Middleman site on my PC. I already had Ruby and RubyGems installed, so I followed the instructions to install Middleman and start a new Middleman site:
gem install middleman
middleman init project
cd project
The next step was to start the preview web server, which produced an error:
$ bundle exec middleman server
DL is deprecated, please use Fiddle
c:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/bundler-1.7.7/lib/bundler/r
ubygems_integration.rb:256:in `block in replace_gem': middleman-cli is not part
of the bundle. Add it to Gemfile. (Gem::LoadError)
from c:/RailsInstaller/Ruby2.1.0/bin/middleman:22:in `<main>'</main>