Im still having the same issues as — Im using windows 10 and exporting to windows 10 universal.
I fixed the problem with the ID by adding the ID in C2 "App".
Also the Version should be something like "1.0.0.0".
That solved some issues. So now I can preview the game in VS 2015 but cannot add this to the windows store due to app manifest problems.
It says its still invalid.
michael
Did you solve the complete issue with publishing to the store or did you get as far as I did?