Sanctum of Exaltation knowledge bug?

I've done all the witch quests, cleansed every sanctum, but i cant do the research in Urdavah because they're still blockaded. On top of that, i only have 15/16 Sanctum knowledge unlocked despite having cleansed all 16 Sanctums and defeated all of the Antumbra bosses. Any ideas how to fix this or do I still need to progress the main story (Just started chapter 7)