No kidding. I’ve got a game breaking bug. The Jorvik quest line is completely unavailable to me. I go. To the Archives to get the second clue for the Firebrand, and while it lights up green, there is no way to interact with it.
in my completed quest list, I have a blank tile that when you select it, the text box is blank, all but the word “completed.” No more quests on the map, and I for some reason cannot complete upgrading my settlement, nor will I be able to kill the zealots because I can’t do the Firebrand quest line.
I it’s too much to start over. Over 200 hrs in.

@nurgle1138 same problem. I’ve flown my raven around looking for a green indicator that means I can upgrade something, but all of them are black and white now. I’ve ridden and run around to each building looking for the sign that indicates you can upgrade, and can find none.
(Mild spoiler):
i also cannot find one tablet of 11 needed to get a cool weapon, as the zealots I needed to kill are vanquished, and I’ve visited all needed locations twice. Also I’m missing a few quests, and cannot interact with a green quest clue. I really don’t want to start all over just so I can finish the game.

I am able to see the green indicator for the 2nd clue for the firebrand quest, but I never received the quest itself it appears. There is a blank indicator in my completed quest list, it shows no text, and when selecting it, it says completed in the otherwise empty dialog box. The quest above it is A Sword-Shower in Anecastre, and the one below it is Reporting on Lincolnshire.

I have completed all active quest lines available to me, but I see several are missing from the completed list. Pricking the Needle and Burning the Firebrand are two, I can research more and list the rest tomorrow if needed.

to clarify, I do still have the quests: A New Home (cannot find the last thing to upgrade), Breaking the Order, and A BriefHistory of the Hidden Ones.