I literally just got Diamond Supportership, I'm not logged onto Minecraft with any other devices and it wont let me log in anymore. All I did is switch from my laptop to my desktop and I even shutdown my laptop, but yet I can't join a single server. Help?
I'm having the problem too. It seems to happen when I try to log back on right after I've logged off. What happens is: I logon successfully and play for a bit. I logoff for a short time (2-3 minutes) I try to log back on, but get the error message instead. I tried logging out of my Minecraft account from the launcher, and then logging back in, but that didn't help.
Looks like a lot of peeps are having the bad login problem. | http://www.minecraftforum.net/topic/2143282-failed-to-login-bad-login-premium-account/