title: HTTP load failed (error code: -999 [1:89]) for Task in iOS 11
body: <p>I'm using URLSession to perform a datatask, when I run it on iOS 11, I get a console error:</p>
  
  <pre><code>HTTP load failed (error code: -999 [1:89]) for Task &lt;68809C58-C6A7-4F10-86A4-81396D8B18CF&gt;.&lt;2&gt;  
  </code></pre>
  
  <p>Any thought on what's causing it, or how to fix it?</p>