I have a recently approved app (launched on March 11th).
On March 12th I generated 20 promo codes to hand out to users. These were generated in App Store Connect > Services > Promo Codes.
Users are now reporting that none of the promo codes work. Some don't get any message, the redeem dialogue just doesn't do anything. Others got an error "This item is no longer available".
Is this a bug or have I done a mistake when generating the promo codes?