When I reach up North to Kynesgrove, Alduin talks to Sahloknir and he isn't responding. In fact, there's no pretty purple magics going on during the revive ritual nor is there a skeletal Sahloknir getting ready to fight. What can I do to fix this? Is there any console commands?

I wated for 24 hours straight to see if that would change anything. Nothing happened. Could it be a mod?