System.Net.Http.HttpRequestException exception will running the UI Test on Physical Device..

I have created a simple Xamarin.Forms(Portable) project and included UI Test project in it. But when i am trying to run the test in physical device it giving me below mentioned exception.

Test Name:  AppLaunches
Test Outcome:   Failed
Result Message:
SetUp : System.Net.Http.HttpRequestException : An error occurred while sending the request.
  ----> System.Net.WebException : The underlying connection was closed: The connection was closed unexpectedly.
Result StandardOutput:  Full log file: C:\Users\Admin\AppData\Local\Temp\uitest\log-2016-10-22_11-04-53-698.txt
Skipping IDE integration as important properties are configured. To force IDE integration, add .PreferIdeSettings() to ConfigureApp.
Android test running Xamarin.UITest version: 2.0.0.1534
Initializing Android app on device ZX1D63GCCL with installed app: co.veloxcore.UITestSample2
Signing apk with Xamarin keystore.
Skipping installation: Already installed.

Here is the link to my project: XamarinUITest