Good Morning, and thank you for posting on the Final Fantasy XIV Technical Support Forums.

Where exactly are you seeing this error? On the character selection screen? When you log into that character, your hotkeys are missing entirely? Can customize them again?

If you can provide screenshots, it may help us better understand your issue.

Hotkeys and Character Config are saved locally, has there been any change in your computer right before this happened?

Any additional information you can provide will help us solve the issue. We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!