I receive the following error when trying to purchase this app. Transaction was declined. [BM-CPEC-02]

• URL: https://play.google.com/store/apps/details?id=com.jmstudios.redmoon
• Payment Method: Google Pay balance
• Phone: OnePlus One
• ROM: https://forum.xda-developers.com/oneplus-one/orig-development/rom-kernel-unofficial-cyanogenmod-13-0-t3242700