The first thing you have to do is disconnect and reconnect the controller> the next thing will be to unplug the keyboard before logging in and try again.
Go to Steam> Settings> Select controller> General controller settings> Choose the type of controller you are using> Press OK and access the game again.
You will have to switch to Steam's Big Picture mode from the game in the library> Manage game> Controller options> "Forced" for "Steam input by game settings"> Restart Steam.
Repeat the same steps above and select "Forced Off" and restart Steam.
That's all you need to know about how to fix Controller Not Working in Fall Guys, we hope you were able to fix this error quickly and that the developers take care of it as soon as possible so that it does not bother you again.