There are invisible walls / barriers, preventing you from entering the longhouses of Morkul Stronghold, in Wrothgar. This was encountered by me (and many other players), on the NA servers on Xbox One. There is no way around them, whether on mount, foot or crouched. There are several AI characters standing or walking around on invisible platforms. Was this latest update not beta-tested before release? I am playing this on my first-gen Xbox One, with a digital-download of the game installed on a portable external USB 3.0 hard drive (it is NOT an SSD drive). I did restart the console after the update was installed.