Player Could Move, Now He Can't!

Heres a challenge for you guys:

My player could move, but now, I tried removing a gun, and now he can’t move, I used Ctrl + Z to undo deleting it and he still can’t move! Heres a thing I think might help you: When I go to Edit → Preferences → Keys, I remember having more… that involved moving that is probably the problem so, how do I fix it. (I have had this problem before, but it was a lame test project, so I just deleted it) This is my best project so far, so it would be awesome if one of you guys could fix it! Thanks!

Oh and I tried Use Defaults, it doesn’t do anything!

Check if all the scripts are intact, prefab connection etc. And by removing, do you mean deleting or a scipt to change the gun?