Why Blizz don't answer? :(

[Immhey-6192]

Can't play. Error 1021

Can play WoW and Hearthstone just fine. Reinstalled D3 for 2 times now and still getting error 1021. Why? Used to be able to just intall and play. Don’t go all crazy tech on me. I have no clue about tech stuff.

[bearbear-11199]

All they will say is that it MUST be a problem on your side and to reboot your router.