I wasn’t able to reply to another thread that brought up the same issue here: "https:/ /us.forums.blizzard.com/en/hearthstone/t/failed-network-error/10678/1_
But I’m having the same issue with SC2 and Blizzard. net app. I have MacOS 10.15.2 (Catalina) and both Safari and Chrome are up to date, and both are experiencing the same timeout.