This error is caused when you have the maximum number of game accounts associated with your Battle.net account.
In-game purchases on this account are blocked by parental controls.
What to do if you get the error “The Offer is Not Available?” when purchasing a product offered at a discount.
A temporary pre-authorization charge may be applied when making a digital purchase.
What to do if you pre purchased MW2 on Steam but are looking to use the Warzone benefits on Battle.net.
How to cancel, return, or exchange a Blink Shopping order during or after BlizzCon
The Battle.net Update Agent detected that one or more system components do not meet system requirements.
Information about more than one person playing Black Ops 4 on the same account.
This error is caused when the transaction is declined by the bank.