I have built house Seaview some 200 hours playtime ago and had no problems whatsoever.

Now suddenly I can only enter into hall, cannot open any doors and if I try to get into main room, I just find an empty shell of the house, and as far as the map is concerned, I can fast travel out of this place.

I have stored all my goodies in the house and now all is lost.

Do I have to start the game again ? Or is this a bug, which can be 'killed'.

By the way I have purchased Heljarchen as well, but I cannot build the house. Alright, I can build - the items are taken out of my inventory, but there is no house, no wall, no something, just empty space.

Help please.