The Battle.net Agent detected that one or more system components do not meet system requirements.
This error is caused when the transaction is declined by the bank.
Troubleshooting steps for payment error: Sorry, we're unable to complete your payment.
Information about why Diablo III may show as Starter on an account
How to pay in a different currency in the Battle.net Shop
Troubleshooting for when one of your games is installed, but the Battle.net app is still giving you an "Install" button instead of "Play."
Information about trading in Diablo III
The Battle.net Update Agent detected that one or more system components do not meet system requirements.