title: System.AggregateException thrown when trying to access server on Xamarin.Forms Android
body: <p>I use a <code>HttpClient</code> to communicate with my server as shown below:</p>
  <pre><code>private static readonly HttpClientHandler Handler = new HttpClientHandler
                                                                   {
                                                                       AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip,
                                                                       AllowAutoRedirect      = true,
                                                                   };
      
  private static readonly HttpClient Client = new HttpClient(Handler, false);
  </code></pre>
  <p>The problem is that I get an <code>System.AggregateException</code> exception on Android. The exception details can be seen in the screenshot below:
  <a href="https://i.stack.imgur.com/dTRk0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dTRk0.png" alt="Exception Screenshot" /></a></p>
  <p>App is working perfectly fine on iOS though.</p>
  <p>Server is using <code>Let's Encrypt</code> certificate and the problem has only surfaced since a week ago after renewing the certificate.</p>
  <p>I have already checked anything regarding certificate validity (Expiry, DNS names, etc.) and all seems to be OK.</p>