I have gotten that before. In fact i have that same problem right now. I went to diablo support and was lookin around and found out that it could be a temp restriction on account. I can access other realms though and i was able to make a new account... Hopefully it will get back to normal after 1-2 days or so the support site said. I was using a bot... and i think i either died a lot or something caused the bot to keep restarting.