Cannot log into HotS

I cannot start HotS. After I started HotS, it shows “An error has occurred.”, and then I can only see a screen without login prompt. There is only a region option box below. I have tried the following link solution, but it doesn’t work at all.

The problem has existed for days. I have also done with WinMTR report. Where can I send it to?

same thing here. Was able to get in once when it let me re-put in my account info, but never again since.

Same here. Mostly stuck with battle.net loading window, pretending to wait for dwnloads. Sometimes get to log-in screen with the error message as in first post.

Meanwhile my 5 days boost is running down while I can’t do a thing (same problem with Overwatch BTW).

Will battle.net go online again in April?

battle.net still unavailable. Guess Blizzard doesn’t care about fixing its buggy software enough so that people can play.