BLZBNTBNA00000A8D

This error indicates a general problem with your connection to the server. Before troubleshooting, double check the Battle.net Privacy Settings via web browser to resolve any issues that would prevent the account from logging in.  If the issue persists, try the steps on our connection troubleshooting article.

If the previous troubleshooting steps didn't resolve the problem, you can ask the Blizzard player community for help on the tech support forums (if available) or other community gaming sites. Local computer or network technicians may also be able to help if you've exhausted all other resources.