title: Vue SPA - PhantomJS works successfully, but Fetch As Google shows blank
body: <p>My team has built a SPA using Vue (<a href="https://tutorismhk.com/" rel="nofollow noreferrer">https://tutorismhk.com/</a>).
  When working on the SEO, we find that Fetch As Google failed to render the page (showing blank page in the preview). There is no error message shown.</p>
  
  <p>We have tested with PhantomJS v2.1.1 - using it to render the above URL from our local machine and snap the screen into an image. It just worked well. </p>
  
  <p>Any idea about how we can debug it?</p>