UWP (which stands for Universal Windows Platform) is a project type which can run on Windows desktop, tablets, and Xbox One.

Xbox One

There was a mismatch between the processor architecture of the project being built “AMD64” …

If running on Xbox One, you may see the following error:

To solve this:

  1. Open the Visual Studio Dev Console
  2. Browse to the libraries/uwp/debug folder where the FlatRedBall dlls are stored
  3. Run the following command:
    corflags flatredballuwp.dll /32BITREQ-

Alternatively, you can create a new build of the FlatRedBall UWP engine for 64-bit by building from source.