Problems in purchases

by clicking to buy one of its products, the following problem occurs: opens a window says “purchasing …” and this window remains until I close it, therefore I can not buy anything, they can give me a hand?

Hi max, are you on the most recent version of dungeon quest? This could be causing your issue.

the version in which the game is 1.8.1 you can tell me if you forecasting to fix this bug? already, thank you