Thank you for the reply CornetEspoir.

This kind of error can be caused by a few things. Some involve routing issues or congestion along your route to the server. Some involve certain configurations/settings within your home network.

There are a few other things you can try to strengthen your home network:

-Make sure your anti-virus/firewall has the appropriate exceptions for Final Fantasy XIV (you can temporarily disable it while you try to connect as well).

-Check the following Port Ranges on your router/modem to ensure that they have been opened:
▼TCP
54992 through 54994,
55006 through 55007,
55021 through 55040
Your ISP can open these ports for you.

-Perform a clean boot. Simply open the task manager and select the 'Start up' tab. Disable everything here and restart the PC. This will make sure that no background processes are interfering with the game.

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