Can't connect to Sandbox for In-App Purchase

Question

I'm working on an app with IAP. Code-wise, everything seems to be done. All my unit tests are passing, I get an instance of SKProduct from the AppStore, have a simple UI in place, etc.

When I try to make a purchase, I can see the standard Sign In to iTunes Store popup. Then, when I enter my test user's credentials, I'm asked for password again and again.

I can't figure out why. Any ideas?

P.S.

• I did logout from AppStore in Settings before trying it.
• I did confirm the e-mail address for test user.

Answer 1

I tried to downgrade the iOS to 7.0.4 (latest stable) and it solved my problem.