My hardware buttons don't work.

Using a SM-N910F (Galaxy Note 4) and the hardware buttons don't work (apart from when touched with S-Pen). Using Stock De-Bloated 1.1. It was working perfectly fine until a few days after. I have tried updating the touch keys fw, but it says that the IC's f/w is higher than bin's f/w.
Phone's Touch key FW version: 0x12
Part's Touch key FW version: 0xfffffffa