Cannot login to HS, friend can on my PC, though

  1. When I try to login to Hearthstone, I see the “recycle”/“reset” button/badge in the center of the screen.
  2. If I click it, then it will disappear and the tavern/front page will act like it is loading, but nothing will ever happen. No matter how long I leave it, the game will be stuck loading
  3. If I don’t click it, then the badge/reset button will hover forever. Nothing changes until I click it.
  4. My friend used my computer and my battle.net launcher to log in to their own account. They did so successfully. It is solely my account which encounters this bug. I have seen this since day 2 of the expansion. I had been able to play day 1.