In App Purchases broken after rebuilding in 4.27.2

Recently I released this game Dot Bot Color Maze on the Play Store and everything worked perfect on launch. However since I upgraded my engine my in app purchases got broke, as in; they only read the product information but whenever I want to buy it always returns failed.
I’ve been trying to fix this issue for over a week now and can’t seem to find where the problem lies. I haven’t changed a thing, just rebuilded my game.
Anyone any idea where this goes wrong?

Bumping :grimacing: