With what version PC Or Android??
If PC create folder move zip or rar file there and chose unpack here.
If Android make sure you install game on your phone not on sd card.
Viewing post in Harem Hotel (18+) NEW UPDATE! comments
Maybe file is corrupted try this one https://nopy.to/V7QgXk0O/harem.hotel-v0.11.2-android.apk