We're using sandbox for testing auto renewing IAP but most of the time it's returning error saying 'Cannot connect to iTunes store'.
We've followed steps mentioned in following document : https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Chapters/ShowUI.html#//apple_ref/doc/uid/TP40008267-CH3-SW11
The System Status for iTunes Sandbox is showing Green (good) right now, but it still doesn't work for me.