Sanctum sky broken

I can start the game, but the totem does not seem to do anything. Some cursory googling makes me think this may be related to the sky in Sanctum being all messed up whenever it loads in as rather than a planet showing up I see this:

I have tried restarting several times, and tried uninstalling and reinstalling, but nothing fixes it. Hope someone can help.

Has it ever worked for you?

What specs is your PC and GPU? Updating your graphics drivers might help. The sky is a cube map and it looks like the top face of the cube is missing.

If you can share your log file that may explain what going wrong:-