A common issue related to Google Play Store is the DF-BPA-O9 error. When you are buying some app in the android store, a pop up appears that says “ Error processing purchase [DF-BPA-09] “. Many users have solved this issue by simply clearing data and cache of the Google Play Store. Like most Google Play errors, is no single solution for this issue. However, here are the steps that have worked for many who experienced the DF-BPA-09 error: