A new version of the issue. I wasn't able to pass the door, as explained by several others. Went into the building by the roof, found her body, went back to Benryn, told him about it han he was not moving - hence the question was not completed. When I logged backed on today, Benryn was inside the house but he was sitting next to the wrong body. One burned out body on the lower floor, while Miri was on 2nd floor.

So I was able to initiate the dialogue and complete the quest.... but someone should tell him he is mourning the wrong body....