It started for me when I got kicked out of the game from one of the event raids and couldn’t log back in. The Help button from the login error took me to an error page. The Support button at the top of the page takes me to an error page. The launcher isn’t loading any of the upcoming items, but is still logged into Battlenet.
After a bit I was able to log back into WoW, but the launcher is still not showing content and the support page is still not working.
At the bottom of my Firefox page it says “the TLS handshake has completed for support.blizzard.com”