Hello everyone,
We have been made aware of an issue affecting players on iOS devices where they are encountering an error when trying to log in with their Battle.net account.
We have already identified the reason for the issue and are developing a fix, but will require some time and a new update to fix.
In the meantime, a workaround for this issue is to tap the “back” button on the in-app Safari window and then the forward button, or by hitting the refresh button if available.
We apologize for the inconvenience.