I got the same problem today, my password inexplicably stopped working (I'm sure that I'm typing the correct password). Also, when I try to change it for a new one I get an error and the one-time password field becomes red.

Now I can't change my password and can't log "Because password entry has failed multiple times, you will not be able to log in for several minutes".

I don't know if is a one-time password problem or what the hell is happening here..