I've been informed that the Professor has been kidnapped, and to meet chief Briggs in the Keep. When I enter the keep, the elevator shows green; when I click it, I get a dialog that tells me I do not have access to the elevator, and the elevator shows red. I reverted to an early save, and replayed before I was informed, but get the same behavior. I might be missing something obvious, but this otherwise seems bugged since I have no way to find Chief Briggs and progress... The Keep is the Structure on the North East side of the island that you opened previously correct? Am I misunderstanding where to go? Thanks!