I have recently bought quartz on the japanese version of the app, however when I now come to buy more I get this message(see screenshot attached. I myself at the moment cannot read japanese so any help on how to get around this problem would be greatly appreciated!
Aah thank you very much, I have used the app to see what the problem was and it just said that I have used the most I can for the month. This is due to me mistakenly putting the wrong age in on the 'My Room' page. I will have to see what I can do to get around to changing the age on there.