Unable to activate windows store app the app didn't start

Question

First of all I would like to say that I already tried all the solutions I could find on the internet, including Unable to Activate Windows Store App

I recently upgra

Answer 1

In my solution, I have a non-UWP project (Multiplatform development) that builds with a different Solution Platform.

I was attempting to run the UWP project in Debug, but as the wrong Solution Platform.

Edit: I also get this when I build my project for Any-CPU, instead of x64.