To reproduce:
1. Open attached project.
2. In the menu bar navigate to Build > build
3. This starts building the player. BuildOption.AutoRunPlayer is also set
4. Notice the errors in the console: Exception: Failed to build Visual Studio project.

This is happening due to 2 things, the BuildOption.AutoRunPlayer and the relative path given. If you don't do an autoRun or you provide an absolute path this issue can be workarounded. It appears that the solution generated can still be deployed manually, but it's not deployed/run automatically)

This does not happen when targeting WP8Player, so appears to be WSA specific. (Tried WSASDK.SDK81 and WSASDK.PhoneSDK81)