The Apple ID you entered couldn't be found or your password was incorrect. Please try again. | In-App Purchase I bought an In-App Purchase yesterday. While buying the app crashed, so I tried to restore the purchase (money was already taken from my account). But if I'm entering my correct Apple-ID password (works when logging in into iTunes), it says:


  The Apple ID you entered couldn't be found or your password was incorrect. Please try again.


When I'm entering a wrong password, it just says:


  Your Apple ID or password is incorrect


What am I doing wrong?
Contact the developer, if no solution ask for a refund via https://reportaproblem.apple.com/