Hello @Daniel_Daniel!
This issue has already been solved and the error should not be appearing anymore.
Here is the main topic for this error:
https://forum.gameflip.com/t/about-purchases-being-decline-during-check-out/41143/2
Godspeed! 
Hello @Daniel_Daniel!
This issue has already been solved and the error should not be appearing anymore.
Here is the main topic for this error:
https://forum.gameflip.com/t/about-purchases-being-decline-during-check-out/41143/2
Godspeed!