My security software is paranoid.  Somewhere in the world someone is doing something it does not like.  So it has temporarily locked any user who is not logged in out.

Sorry for this inconvenience.

Don’t Worry.  It will come right back.

I am fine tuning these settings so that only bad guys will be locked out and you won’t.  I apologize for making you suffer because a scumbag is up to no good.