Sinon j'ai trouvé ça sur le forum de Steam :
Fix for those who have buttons that are not working after rebinding them.
Whenever you bind a button and it asks to overwrite that button will no longer work. Hopefully the devs will fix it soon.
Firstly you must go to the control settings and click reset at the bottom. Whatever you want to rebind (or any function that currently uses a key you want to use) you must bind it to a placeholder key so you never need to overwrite. I used the whole numpad. -, =, [ and ], etc. Then go back to those keys and bind them to what you want. If you missed one and it asks to overwrite, don't. Go find that key and bind it as a placeholder. Once you fill all the placeholder keybinds with the ones you want it should now work like normal.