This error occurs when you have connected to our patch server but you cannot download patch information.
Troubleshooting steps for disconnection problems with the Battle.net mobile app
Information about what to do if you are experiencing reduced performance on the Beta version of the Battle.net Desktop App
Information on Overwatch Error (0xE01200D0).
Troubleshooting steps for Overwatch 2 connection problems on console
This error means the Battle.net Agent (the process that installs and patches our games) couldn't stream necessary files.