Windows Phone 8.1 app won't run in Emulator

Question

I am getting this error

Package could not be registered.

When I try to run my 8.1 Silverlight app in the emulator.

I have no errors in any of the event logs for AppxDeploy either.

This was a 7.1 app I upgraded to 8.0. Then upgraded to 8.1.

I am using Visual Studio 2013 (V12) Update 2 RC.

I will be active on this post and will return if more information is needed.

Answer 1

Wrong Product ID and Publisher ID in the WMAppManifest.xml file for the project.

Use the ones found in your App and Account summary pages in Dev Center, and it should work fine.