Thank you for the reply snuffem.

If you have not attempted a reinstall of the game, I'd suggest doing so. When you do, make sure to remove the locally-saved data folder (located My Documents > My Games > Final Fantasy XIV). Be sure to make a backup of this just in case it doesn't resolve the issue.

Additionally, can you provide the full error message? Providing a screenshot of it will work.

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