Hi guys. After days not starting my Countryman today I jump started it and when I try to step on the clutch it went full to the floor and doesn't come back. What could be the problem and how can I fix it?

 

Could be slave cylinder failure, master cylinder failure, release lever broken, pressure plate broken... I would start by looking under the car to see if there is fluid on the ground and see if you can tell if the slave cylinder is moving.