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

Can you provide the error message you are receiving?

If this is only happening with one character, you may want to try deleting the locally-saved data folder (located My Documents > My Games > Final Fantasy XIV). Make sure to create a backup of this so you can replace it if it doesn't solve the issue.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!