JsonSerializationException 'Unable to find a constructor' on Xamarin.Android

Question

I have this very odd problem with my code, and it\'s a pretty new problem, considering I didn\'t have it half a year ago. Long story short, I\'ve made an app in Xamarin, and

Answer 1

In the 'Android options' tab of the project properties, there is a 'linker' tab. Is the selected option in the 'Linking' dropdown "Sdk Assemblies only" or is it "Sdk and user assemblies"?

If it is the latter, the parameterless constructor is skipped when linking, because no use is detected. So change it to "Sdk Assemblies only".