Today starting the game it asked me to select a data center and when I try to login with a character, it says it cannot locate character config data, and asks if I would like to create new data.

If I say yes, am I going to loose something?

If I try to create a new character it can find appearance data to load.

A difference today is that I logged out yesterday with the screen windowed, so I changed the configuration first before trying to log in.