title: 'require': cannot load such file -- 'nokogiri\nokogiri' (LoadError) when running `rails server`
body: <p>I'm running a clean install of Ruby 2.2.1 on Windows 8.1 with DevKit. After the installation I run:</p>
  
  <pre><code>gem install rails
  rails new testapp
  cd testapp
  rails server
  </code></pre>
  
  <p>leaving everything else at default.</p>
  
  <p>The process fails at the last line when, instead of running the server, I get the error message </p>
  
  <pre><code>in 'require': cannot load such file -- 'nokogiri\nokogiri' (LoadError)
  </code></pre>
  
  <p>It happens every time and I've looked around and tried everything I found to fix it, but nothing so far has worked.</p>
  
  <p>What is the problem here and how do I get a simple test Rails app to work?</p>