title: I'm getting "Error 403" when installing rails
body: <p>I'm trying to install rails -v 5.2.2 on wsl ubuntu 18.04.
  Im met with following error:</p>
  <pre><code>ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
      bad response Forbidden 403 (https://api.rubygems.org/quick/Marshal.4.8/nokogiri-1.13.3-x64-unknown.gemspec.rz)
  </code></pre>
  <p>I'm relatively new to bash and I'm not sure what to do at this point, as google failed me. Help? :)</p>