HybridWebView (2.0.5726-pre6) does not work on iOS and WindowsPhone

I tried everything, but I can not make it work on iOS and WP. Web page does not show, and on Android, Google page has black background.
I simply get: https://github.com/XLabs/XLabs.HybridPlayground but it did not work (as I remember) on all platforms, so I updated Xamarin Forms there to the latest stable version, and XLabs Forms to latest pre (2.0.5726-pre6).

Here is that project:
https://www.dropbox.com/s/q11rya0dobsbsh4/XLabs.HybridPlayground-master.zip?dl=0