Why did the trackpad settings disappear on a 2011 MacBook pro13?

Question

macOS

reinstalled the axis on a macbook pro 13 "late 2011, set high sierra, officially put on it, go to the trackpad settings to configure, the usual touch instead of physical pressing and imitation of the right button, but in the settings I saw an inscription that the trackpad was not detected, that is, the beech asks to find it external via Bluetooth, while the touchpad works fine

Answer 1

You probably have a disconnected battery, connect it, even if it is not working, and the settings will appear