You having that problem too? Just tried updating from 0.43 to 0.45 and the app wont install. This question has probably been asked before but how can I fix this?
You need to repair the doors then they should automatically come. If your not at that part, then visit all of them and max them out, as much as you can, then repeat above. This being during exile btw. Hope this helped!
If you are at that point, i believe you need to fix the doors (new etheria + taille) and she should move into her room and you can do it then. Not sure tho, sorry
I believe it is after you have met all of the girls pre-Exile and they show up on the girls menu. You might have to do some extra quests but not sure. Hope this helped!