The sky is completely dark. I don’t think this is related to the objects because the unreal template creates them.
I see the same issue when I create an environment from scratch. If I create an environment from a new project, the sky looks fine. I guess it is something to do with my project settings. What can I try?
Check to make sure ‘Support Sky Atmosphere’ is enabled under Engine → Rendering → Shader Permutation Reduction in your project settings. After restarting your editor, you should see a hefty number of shaders being compiled. This solved the problem for me.