I built my apk following the UDP manual. For in-app purchase, I used the UDP package instead of Unity IAP. I also successly finished the sandbox test. But when uploading the apk to UDP console, I got this error "The UDP SDK was not detected in your APK. The UDP console will only accept games that implement UDP." I am very confused! I think the sandbox test result proves that the apk has implemented UDP properly. Can any one tells my what I did wrong? Best regards!