Xamarin Forms Images not loading from remote URL

Use native http client handlers + TLS2.0 for your app (can be set in project settings):

• https://developer.xamarin.com/guides/android/application_fundamentals/http-stack/
• https://developer.xamarin.com/guides/cross-platform/macios/http-stack/

For iOS also enable http downloads:

• How do I load an HTTP URL with App Transport Security enabled in iOS 9?

I had this issue. Remote images would display in UWP and ISO, but would not display in Android. What worked was updating the NuGet Xamarin packages.