title: Cannot connect to iTunes Store (Code=0) when purchase
body: <p>I have setup all necessary (bundleId, iTunesConnect stuff, banking info) and still getting connection error when trying to purchase a subscription.
  What am I missing? 
  The only thing I still didn't check is the state of subscription (it's Ready to submit at the moment).
  Do I need to submit subscription to review in order to be able to test it?</p>