I try to upload my Windows Phone 8.1 app updated package (.appxupload) to the Windows Store and it tells me "This submission failed with error code(s) 2001. More info about the error(s) can be found here." with a reference to this page: https://msdn.microsoft.com/en-us/windows/uwp/publish/resolve-submission-errors
I can sucessfully build and deploy my app with Visual Studio in both release and debug mode, and also pass the certification, but the Store stops me. Any ideas?