Hey @elsafiro !
Thanks for the update. Sorry to hear that didn't lead to a solution.
As a next step, I'd recommend disconnecting any USB devices that aren't required for the game (USB Hubs, headsets, the controller) to see if controls are possible just with mouse and keyboard initially. If that makes a change, we can proceed by process of elimination to see if it's a device that's causing it.
It would also be useful to check the folder where ACValhalla.ini is located to see if it's Read-Only. Sometimes Windows will set those files to this, and that can...