Therefore, in the solution below, we have listed methods to help you completely fix this issue by changing the Direct X version that your game uses during launch.
Please note that this means if you are playing on the normal Windows launcher and this does not work then you will need to download the launcher through the Steam client which you can download from Steam.Final Fantasy series is one of the most popular Video game series and its fanbase awaits patiently for each new installment to the franchise. For more information, please refer to the Lodestone article here: Non-Steam Window service accounts will no longer be able to launch the game from Steam.
In addition, if you have a non-Steam Windows version registered on a service account, you will need to use the standalone Windows launcher downloaded from our official site. Any other method of direct startup will no longer be available, and you will receive a message stating that you do not have any subscriptions or game time on the account. Due to this, for Steam version service accounts, the FINAL FANTASY XIV client application will need to be launched from your Steam Library directly. Please also note, on August 29, 2019, we implemented a restricted login check process for Steam service account users as part of our fraud prevention measures. Please be sure to purchase the correct version for your SQUARE ENIX Account. Notices regarding this version incompatibility are available on the product pages for both the SQUARE ENIX Online Store and the Steam Store. Expansions also must be registered on the same platform as their base game.
However, due to some additional features associated with the Steam platform, a standard Windows PC version of FINAL FANTASY XIV is incompatible with a Steam version of the same title. Both versions of FINAL FANTASY XIV are identical.