Diablo install problem

“Mamy problem z przesyłaniem danych. Spróbuj ponownie później.”

Kod błędu : BLZBNTAGT00001399
Anyone can help me?

Did you follow the steps Blizzard has on their support docs?

If you paused system updates, aren’t running Bnet as admin, or have a hanging Agent.exe process, these can all contribute to the issue.