Hello!

If you're like me, you had an issue with the skybox and seek assistance. I've figured it out, so I'll share. This works on most other maps that have a broken skybox too.

Simply go to your settings, click Advanced Settings, and switch HDR to "Full (when possible)". Once this is done, exit to the menu and do the same thing, then close and reopen the game. Restarting the map will yield a proper skybox!