Recently I was trying the new Unity Input System package on a cross platform project.
Everything was going well until I switched to the tvOS Build Setting and then the project would not run in the editor or build.
It appears that the Input System package has a dependency on the VR package but there is no VR support for tvOS so the project will not build.
The solution is to disable the built in VR package in the Package Manager:
Then you will find joy and your tvOS build will succeed.
And I raised the issue on Github and the Unity folks moved it here for tracking:
The original blog post that helped me solve the problem can be found here: