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

When did this first occur? Did anything change/update on your PC that coincides with this? Do you notice any pattern to this error (Only when teleporting, only in instances, etc.)?

As for what you can do to alleviate the error, try some of the following troubleshooting methods:

Switch to DirectX 9 mode (select ‘Config’ from the launcher)
Update/reinstall Graphics card drivers
Make sure to disable all unnecessary or resource-heavy programs/overlays.
Set compatibility mode to Windows 7 (right click on the exe file and select ‘Properties.’ Then select the ‘Compatibility’ tab and choose Windows 7)
Try a clean boot. Simply open the task manager and select the 'Start up' Tab. Disable everything here and restart the PC.

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