Error when I launch the game (mostly dl errors apparently)

Hello everyone,
my friend send me an invitation for "Welcome Back in Eorzea" campaign. So, I reinstalled the game and even bought StormBlood (I stopped at Heavensward). But when I start the game, I get an error message when the game window (after entering my logs) launches.
DirectX11 : https://imgur.com/iMpdLZP
When I disable it via the launcher configuration button : https://imgur.com/YPzGTE9
The pc is like new, it has been formatted, the drivers of the graphics card are up to date. Same for the DirectX.

When I check in my :C harddrive, I have the dll files. So I don't what's wrong and I'm not good in computer.

Operating system : W10 64bits (10.0 build 17134)
Asus G750JM
Bios : G750JM.205
Processor : Intel(R) Core(TM) i7-4700HQ CPU @2.40Ghz (8CPUs), ~2.4Ghz
Memory 16384MB RAM
DirectX 12
Nvidia GeForce GTX 860M and Intel(R) HD Graphics 4600

Hello Pilobill, Thank you for posting on the Final Fantasy XIV Technical Support Forums

Because of the error you received I would like to suggest uninstalling the game and reinstalling it.

Please uninstall Final Fantasy XIV from your computer. Make sure to delete any remaining FFXIV files from your computer, including any potential files in your ‘Documents’ folder. Then reinstall the game from scratch. If you need a digital version of this, it can be found here: http://www.finalfantasyxiv.com/playersdownload/na/. Any updates or expansions will be downloaded to your computer once logged into the appropriate account.

Hope to be of assistance.

Thanks for the answer. I had already done that.
In fact, a friend suggested me to download a previous version of the driver of my graphic card. And it solved my problem.
So I can play the game. :)

Hello Pilobill, Thank you for posting on the Final Fantasy XIV Technical Support Forums

Thats great! I will be moving this thread to "closed concerns" If you have any other issues please do not hesitate to create a new thread.

Thank you for playing Final Fantasy XIV! Hope to see you online.