I don’t know what started it, as I had been able to compile just fine previously. This is a pretty small test project, but I think it may be the last straw for my using the Uno Platform for development. Everything feels so fragile.
Anyway, this is the error message. It generates several every time I try to build, each message longer than the last:

I’m migrating an app from Xamarin Forms to Uno Platform. In my Xamarin app I’m overriding the OnAppearing method for handle the GoBack() method and reload the data in the original page.