Managed to get the Acquaint sample app building after excluding the UWP and Android versions and just building for iOS ( Xamarin Forms version not the native version ). However when debugging the app I get an error about the Xamarin.Forms.Xaml.XamlParseException.
Xamarin.Forms.Xaml.XamlParseException: Position 39:15. Type fftransformations:CircleTransformation not found in xmlns clr-namespace:FFImageLoading.Transformations;assembly=FFImageLoading.Transformations
then the app crashes.
I have updated using NuGet to the latest Xamarin packages ( not including pre-releases and not including the PInvoke library updates which would not install )