Looks like it might have been accidentally deleted? If you had a Pro account, this would be an easy fix. You could transmogrify a new page for the Redbrand hideout from a fresh copy. As it is, you basically have three options: 1) rebuild the dynamic lighting yourself 2) create a new game copy and use the character vault to move the player characters into it. I f you have made significant alterations to the adventure, this could be a lot of work. In which case: 3) As above, but only move the characters for when they are on the Redbrand map. Then return tot he original campaign There is a fourth option, but that would require money: Up your subscription to Pro for a month, and use the transmogrifier to move in a fresh copy of that page from a new game. And finally, the fifth option: Appeal tot he devs in a Help Center Request and explain you issue. There is no guarantee here, but they might be able to restore that page for you.