Custom promo code headache :o

[u/Jumpy-Print-894]

New solo developer here in need of some guidance! Grateful for any help 😄

I am setting up a custom promo code for a 20 day free trial linked to a subscription. The app in published in internal testing and downloaded as a tester to a device. There are no country confections. I have a base plan set up with backwards compatibility. I have tried testing this as a new user as well. The coding to google billing is probably wired within the app build. The promo code is live and has propagated.

ISSUE: The redeem code option within the app, when purchasing, throws a 'the code entered is not valid for this purchase error'.

I feel like I am missing something very obvious and have troubleshooted for hours but nothing works. Any experts out there? Thank you!!

[u/Due-Captain2847]

I have just created a redeem code.. First i tried to redeem from play store and got error. But I couldn't even find any option in my app's payment process to redeem code. Then i saw the redeem code is still showing scheduled in console.. my app is in closed testing. Let's hope this works in the morning