Diablo IV Error Code 1

Follow all the steps below to help with the connection error.

1. Reset your network devices to make sure your router hasn't become flooded with data.
2. If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
3. Check your network configuration to find any issues with your firewall, router, or port settings.

If none of these help, you can also run your console's built-in connection test to diagnose the issue (PlayStation 4) (Xbox One).

Tried everything here?

If the above steps did not resolve your problem, visit our Diablo IV forums or contact your console's manufacturer for more assistance (Sony) (Microsoft)