Primm does not move... WHY???

[Richter Masters]

I found Primm at Pandora's Castle playing with a XBOX 360 controller. But she stands still, does not move...

[Doresh]

I think that's a bug which accidentally registers the keyboard as player 2. Unplugging the controller seems to help sometimes.

Worst case scenario, you'll have to play with the keyboard until a patch fixes this.

[Aikner]

Had the same problem. In my case another device was acting as second game controller without me noticing (Airmouse, Keyboard) So I deactivated the game controller entry of the device in windows, after that it worked. They really should give an option to turn off multiplayer.

[Hash Clash]

Might want to go to controller settings in Big Picture Mode and see which controllers are recognized. You can disconnect some of them and see if it helps. However, I haven't seen a way to disable second player in-game without restarting the whole game.