Vault Won't Open

Today, after using my system for a while, including having N360 fill in my user name and passwords as per usual. I noticed that the Vault was closed. I didn't close it, so was mystified. When I tried to open it, the procedure was different. Normally, when I open the Vault, I have to enter my password and away it goes. Today, it asked me to enter my email address/userID, then asked me for my password. I got past the user ID with no problem but, when I entered my password, it said it's invalid. I did a reboot and tried it again and got exactly the same problem. Just so there is no confusion, I am NOT entering an invalid password. As it stands, I cannot open the vault. It's not the end of the world, but something strange is going on. Was there some kind of update to N360 today which might have caused this problem? My version is 21.7.0.11.