Apple Appstore - Receiving subscription error 21101 while trying to subscribe on TestFlight builds

I am experiencing a "Appstore subscription error 21104 There's no information available for In-App Purchases. Try again later." when trying to subscribe on our TestFlight builds.

So far I couldn't find anything promising on internet for figuring out why it's happening. Any info on this is appreciated.

Thank you!

From status: Status codes 21100-21199 are various internal data access errors.

You should try again later when receiving an internal data access error.

Apple Appstore - Receiving subscription error 21101 while trying to subscribe on TestFlight builds
 
 
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