Got the same problem in the new harem overview and in some shop tabs, but i think this is exactly the weak point. The harem dialogue e.g. loads all accessible girls first (visible if you have a not-so-fast internet) and then sorts them, on default by which you already have recruited. This is a whole lot work and it seems that the server doesn't accept the money taking request while still sorting stuff in the background. Plus this happens for all players online simultaneously, probably the server needs a shirt cause it's gettin' really sweaty there ...
