[Info] Invisible terrain

[sirlollodod]

Ok, i know it should be a common error to have invisible object.
Anyway, i found this on this particular point in the terrain, as the image show.
Map: Fallen Fighters

[a E z.]

Mine does the exact same, it's not exactly invisible, just blacked out. I can't access the game menu with 'Esc' either. Any fixes please?