You should note that the link you shared requests an authorization in order to download its content, maybe you should make it public.
Also in the meanwhile I may have a workaround for your bug so you can get your wife back, I haven't tested it tho.
- Enable cheats
(Documents => Mount and Blade II Bannerlord => Configs => open engine_config.txt and edit "cheat_mode = 0" to "cheat_mode = 1")
- Go in game, load your save, open the console by pressing CTRL + ²
(or CTRL + SHIFT + ~ it depends on your keyboard layout), then write :
Example :
I found this solution here :
https://forums.taleworlds.com/index.php?threads/companion-stuck-in-unreachable-area.414059/