title: Error: Cannot find module 'eslint/lib/rules/no-unused-expressions'
body: <p>After installing ESLint through NPM, I'm getting the following error in my browser:</p>
  
  <blockquote>
    <p>Error: Cannot find module 'eslint/lib/rules/no-unused-expressions'
    Referenced from:</p>
  </blockquote>
  
  <p>Any idea what could cause this and how I can fix it?</p>