Thank you for the update Xestor.

You mentioned that this only happened once you got to the 4.1 MSQ, correct? It should be mentioned that your graphics card doesn't hit the minimum requirements for Stormblood (however, it does for the base game, this could explain why you don't have any issues in earlier areas of the game). have you had any issues in areas outside of Stormblood content? What kind of GPU does your friend have, on the PC that you were able to log in with?

Try lowering some of the graphical settings (even if you didn't have an issue with it before). Also try running the game in windows or borderless mode instead of fullscreen. Does this have any affect on the issue?

You may also want to go into the Nvidia Control Panel and select 'Manage 3D settings'. From here, select 'Program Settings' and then Final Fantasy XIV. You should be able to select which graphics card you want to run the game. Select the GTX 940M (it's usually set to Auto by default). Then in the Power Management Options, make sure it's set to 'Prefer High Performance'.

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