I have an app in Pending Developer Release status and have generated a promo to test app on final time before release. After entering promo code in App Store app, I get the following error:
Unable to Redeem "This content is incompatible with the current software on this device. Update you device to the latest software version and try again."
The device in question has been running TestFlight and Xcode builds without issue. The device is an iPhone 14 Pro running 18.6.
App is built with minimum deployment of 18.0.