Hi I’ve done all of the items you mentioned and still nothing has changed.

I have also,
- reinstalled all drivers
- uninstalled all other applications
- uninstalled AMD Radeon Software
- upgraded to AMD Adrenaline 2.5.1 Driver
- reinstalled DirectX11
- uninstalled and reinstalled Steam
- uninstalled and reinstalled FFXIV from steam multiple times
- restarted my computer numerous times after each of these attempts

And I’m still getting the same error code immediately after clicking “Play”