angular-cli build prod "Runtime compiler is not loaded” : <p>I did ng build -prod and met a weird error that is 
_zone_symbol__error
:</p>

<pre><code>Error: Uncaught (in promise): Error: Runtime compiler is not loaded Error: Runtime compiler is not loaded at d (http://localhost:4200/polyfills.cd321326a3dfc08ceb46.bund
</code></pre>

<p>I am not using the compiler manually in my app. And the weirdest is that the error seems to come from the polyfills. 
How can i solve this?</p>
