title: npm cannot install 'node-sass'
body: <p>I'm trying to run a project with npm start and then get the following error in a bunch of different components:</p>
  
  <pre><code>Module build failed: Error: Cannot find module 'node-sass'
  </code></pre>
  
  <p>Alright, I'm thinking and I run 'npm install node-sass', which then leaves me with the following error:</p>
  
  <pre><code>Error: EINVAL: invalid argument, open '/usr/app/client/node_modules/node-sass/package.json'
      at Object.fs.openSync (fs.js:646:18)
      at Object.fs.readFileSync (fs.js:551:33)
      at Object.Module._extensions..json (module.js:670:20)
      at Module.load (module.js:566:32)
      at tryModuleLoad (module.js:506:12)
      at Function.Module._load (module.js:498:3)
      at Module.require (module.js:597:17)
      at require (internal/module.js:11:18)
      at Object.&lt;anonymous&gt; (/usr/app/client/node_modules/node-sass/lib/extensions.js:7:9)
      at Module._compile (module.js:653:30)
  </code></pre>
  
  <p>I don't know what it means or what I can do to resolve it, I tried commands like npm rebuild, npm uninstall and then install again, deleted the node_modules folder but that doesn't seem to do the trick.</p>