title: Sprockets::FileNotFound at / couldn't find file 'react-server' with type 'application/javascript'
body: <p>I'm returning to a website that I made about a year and a half ago, and when spinning up the rails server, I get this error:</p>
  
  <p><strong>Sprockets::FileNotFound at /
  couldn't find file 'react-server' with type 'application/javascript'
  Checked in these paths:</strong> [bunch of file paths...]</p>
  
  <p>The errors looks the same as this issue:
  <a href="https://stackoverflow.com/questions/46240966/rails-web-pack-react-sprocket-couldnt-find-file-react-server">rails web pack react - sprocket couldn&#39;t find file react-server</a></p>
  
  <p>The previous post talks about removing old react rails files, but I don't know which files that would be referring to.</p>
  
  <hr>
  
  <p>RESOLVED</p>
  
  <hr>
  
  <p>In the end, it was one installation and one gemfile addition that did the trick. I ran: npm install --save react-server, and then I added: gem 'react-rails', to my gemfile, then of course ran bundle exec install.</p>