Unable to redeem promo codes (iOS 17.5.1)

My app is in pending developer release but promo codes can't be redeemed. It says "Unable to Redeem: This content is incompatible with the current software on this device. Update your device to the latest software version and try again." but the devices run the latest iOS version (iPadOS 17.5.1 and iOS 17.5.1).

I also tried to enable preordering but codes still can't be redeemed.

Via TestFlight the game can be installed and runs without problems but I don't want to use TestFlight to make the outreach campaign.

Is this a bug in iOS 17.5.1?

Unable to redeem promo codes (iOS 17.5.1)
 
 
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