Good morning! Thank you for posting in the Final Fantasy XIV Technical Support Forums.

We apologize for any inconvenience you have been experiencing. There are a few situations that can cause the error you are describing, please provide us with the following:

Are you on a Desktop or Laptop?
Does this only happen with Final Fantasy XIV?
Does this issue occur for all characters?
Does the issue persist if you switch between Fullscreen mode and borderless windowed mode?
Have you tried connecting the device using a different method (wired, different port, etc.)?

We recommend double checking both the in-game settings as well as your Windows mouse settings.

Thank you for visiting the Final Fantasy XIV Technical Support Forums!