When entering the shrine a message appears with an error saying there are no animations for "Armun Caravan", which makes the Daedric Shrine impossible to enter.
ID: terrain_rock_ai_02 Cell: 0,-31 (Aanthirin Region) X: 7987.473 Y: -249378.641 Z: 1109.634 Issue: Floating, as is the terrain_rock_ai_04 next to it Image: https://i.imgur.com/ltlz3HA.png
As soon as my perfectly healthy character enters the vault in the Andas Estate in Andothren for the first time, my character is turned into a vamire, i.e., it gives me the statuses Weakness to Fire, Vampirism and Sun Damage.
I first tried to enter the vault before I had started any of the quests related to the Andas Estate and was turned into a vampire. I thought this was an intended effect and thought this may be related to a quest. I reloaded the game and decided to visit the vault again later.