Macbook Pro TrackPad not clicking

I'm using a macbook pro, now the TrackPad could not be "clicked" when I press the bottom right corner.

I couldn't do the "right click" now.

This is awkward.

I know that in System Preference -> TrackPad, I could set the "Tap to click", but then I couldn't use the three fingers swipe to toggle different screens.

Any idea to fix it?