Cursor sticking to top right of screen

Whenever I boot up Civ VI, my cursor automatically is trying to go to the top left corner of the screen. I can move it, but it moves back almost immediately, making it virtually impossible to click any buttons - not even the terms of service. How do I fix this?

Edit: It's actually the top left, if that's relevant.

Edit 2: Fixed it! Seems like Steam was detecting a nonexistent gamepad/controller. Selecting Sid Meier's Civilization VI in Steam, clicking the controller, and selecting "Disable Steam Input" near the top right seems to work. Hope this helps someone!