I am having problems testing my in-app purchases. I get back valid product identifiers, but upon purchase I receive the dreaded \"Cannot connect to iTunes Store\". Interesti
I was able to purchase in-app on iPhone but not on iPad(11.0.2). I tried with all mentioned solution but none helps. After trying all other possibilities, finally I was able to make it work.
When you create a test account in iTunes connect, don't verify the email id. If it is verified, iap returns "Cannot connect to iTunes" error. It looks strange but it is how worked for me. In iPhone, irrespective of email verification, I am able to purchase using test account.