If you press the black wheel and nothing happens, try pulling the black wheel from the encoder. Once the black piece is separated from the machine, try to navigate the menu by directly interacting with the encoder: check if rotation and the button work this way.
If it does, please grab a small piece of paper and introduce it inside the hole underneath the black wheel. Put the wheel back into the machine by inserting the encoder inside the hole. That piece of paper will stop the encoder from getting to far inside the hole.