Binding using FFImageLoading.Cross.MvxCachedImageView in iOS

Question

I'm using FFImageLoading.Cross.MvxCachedImageView and trying to make conditional binding in iOS, but it fails with the following Mvx trace:

Problem seen during binding execution for binding Image for MvxValueConverterValueCombiner combiner-operation - problem ArgumentException: Object of type 'System.String' cannot be converted to type 'UIKit.UIImage'.

Does anyone know what could be wrong?

set.Bind(imgInfo)
        .For(x => x.DataLocationUri)
        .OneWay()
        .SourceDescribed(@"If(IsFake, 'res:ic_lock_open_white', 'res:ic_info_outline_white')");