skybox problem

I downloaded this skybox (https://tf2maps.net/downloads/sky_starclear_01.17080/) from this website, and when I ran my map through a debugging program, it said it wasn't valid. Any help?

hey, this is my first post on this forum, and I'm making a tf2 map (shocking I know) and I've been having this problem that's plagued my map for months now, sometimes it stops and works other times it doesn't, I've tried taking the map apart and putting it back together and I just cant figure...

Hello! So I have a decompiled map that I want to make an edit for. I have a problem fixing the skybox of the map, the map's skybox doesn't show up like pictured below. I have followed along both 3kliksphilip's and TopHATTwaffle's tutorials and I added a sky_camera in the skybox and the...