106 quicksilver brake problem

Yesterday my brake suddenly dropped to zero and kept it at the lowest level of the brake pedal, and I looked at the brake hydraulic oil, it was very low, when I checked the wheels, there was lubrication inside the right rear wheel, just in the right rear and I left the car today. If the problem can be from the brake center or from the hoses, if you can help, I would be happy. Thanks in advance.

may have missed from the center, may have missed from the hoses thank goodness it has not been a big problem.

probably one of your hoses

Thank God I grazed with this much, I bought oil from gasoline for your help, I filled it again, five minutes later, there was a reduction in the finger, is it normal to reduce it?

when braking, it throws cracks or there is a problem in the center I think