The process to set up Apple Pay Cash account is all about adding bank a bank account or payment method. On Apple one can add debit and credit cards. Sometime you find error when you setup Apple Pay Cash Account. Many of the reason behind is, users must be at least or more than 18 years old, make sure that your iOS device with the version of 11.2 or latest, also make sure that your card is valid before adding. Date and time are correctly saved on your phone and your internet connection is quite strong.