That's weird, specially considering I configured FFXIV on my nvidia control panel to use the Nvidia GPU.
So I tried discovering how to disable optimus on my pc and it turns out I can't. But the weird thing is: earlier this year I was able to play FFXIV without any problems! And I didn't change anything on my pc (save updating the drivers)
I then decided to try using the nvidia gpu as my global configuration, but when doing that the FFXIV Launcher won't load correctly, not allowing me to do my login, staying always in the screen with the game logo.