title: ERROR in ./node_modules/@angular/core/fesm5/core.js
body: <p>I'm pretty new to Angular and when trying to buid the app (ng build) I get this:</p>
  <pre><code>ERROR in ./node_modules/@angular/core/fesm5/core.js
  Module build failed: Error: UNKNOWN: unknown error, read
  at Object.readSync (fs.js:568:3)
  at tryReadSync (fs.js:353:20)
  at Object.readFileSync (fs.js:382:19)
  at Storage.provideSync
  </code></pre>
  <p>Any Idea of how can I buld my app?</p>
  <p>Thank you in advance!</p>