Where do i start bfa quest line?

[Nok-winterhoof (Nok)]

There’s some bugs:

I cant start BFA

I finished the battle for lorderon quest and i cant get the quest to go to sithilus to start BFA, I went to sithilus and tried to see if i could interact with the NPC with no luck. I have two characters on the alliance side that cant progress. Can i get some help getting that quest activated on my ally mage and shaman?