If you made it to our troubleshooting section, you already know that one of our recommendations is a firmware update. Perhaps you have the Xbox controller, but no Xbox. If so, you can update the firmware on a PC as well.
Install the Xbox Accessories app and connect your Xbox Wireless Controller with a USB cable or Wireless Adaptor. A pop-up window will appear, letting you know that it needs a firmware update. Follow the on-screen prompts to update the controller.