If your FZ152 lens is stuck and will not retract or fully extend, there may be a foreign object preventing it from fully extending and retracting.
Turn the FZ152 OFF and restart it to reset the lens. Check to make sure there are no small particles, dirt, dust, fibers, etc. that are preventing the lens from operating. If found, use a soft, clean cloth to clean around the lens and try to power ON and restart your FZ152.