IAP. GetProductsBySKU returning 500

Hi,

Recently IAP.GetProductsBySKU started failing  in Unity app with

Code: 20001, HTTPCode: 500, Message: {"error":{"X-FB-Debug":"Qdys/WoLVIZztE3uCQ2y79x2u6OpDuLsmjqeA/hIMC8kYvC1iArjkvnhLYRRhycciBo3z8qpVvWomk1AM4F9hQ==","code":1,"message":"An unknown error occurred","x-fb-trace-id":"ANo00ooG9pl"}}

This used to work, I didn't change anything:

* Other endpoints return data correctly and succeed (Users.GetLoggedInUser, IAP.GetViewerPurchases, Entitlements.IsUserEntitledToApplication).
* The app initialized successfully with the app id.

* Data use checkup is all green (Attached pictures)

I don't know what else to try, all other endpoints except