Angular 6 - WebSocket is closed before the connection is established : <p>Everytime I start my application I get this. I don't use SSL and I am connecting to localhost:4200.</p>

<p>WebSocket is closed before the connection is established</p>

<p>What would cause this?</p>

<p><a href="https://i.stack.imgur.com/xt2Fv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xt2Fv.png" alt="enter image description here"></a></p>
