I have some new information. I heard on reddit that you could open barred doors by using rank 2 dive of the valkyries on the door, so that it would break the lock with the big AoE. I did this and I managed to get into the longhouse. However it did not trigger a cinematic, there were a few enemies in there aswell as an enemy that doesn't die, think quest npc's in Skyrim. I hope I didn't break the quest further. I am still stuck.

I have some new information. I heard on reddit that you could open barred doors by using rank 2 dive of the valkyries on the door, so that it would break the lock with the big AoE. I did this and I managed to get into the longhouse. However it did not trigger a cinematic, there were a few enemies in there aswell as an enemy that doesn't die, think quest npc's in Skyrim. I hope I didn't break the quest further. I am still stuck.

Having the same problem on PC