How to troubleshoot connection issues between Battle.net and Steam

How to resolve the error message "We can’t process this code at this time"

Troubleshooting for Authenticator Error - Please Connect to a Network: Your device is currently not connected to a network. Please try again later.

Information about the error message "You can’t make this purchase because your previous purchase is under review" and troubleshooting steps

How to resolve this error when trying to log in to Battle.net

Troubleshooting issues with sending and receiving new Battle.net friend requests

What to do when you are unable to complete a payment and you haven't received any error during your purchase attempt

What to do if you receive this error when sending friend requests

Troubleshooting steps for the BLZBNTGFT00000001 error.

Information on troubleshooting the BLZBNTBTS0000005C error