My Krups EA844250 start to leak water from the bottom.

My Krups EA844250 start to leak water from the bottom.

My Krups espresso machine model EA844250 leaking water. I checked the piston and coffee preparation chamber and they are both working correct without any leak, looks like water coming from some connection near the water tank, but I can’t verify this because couldn’t understand how to remove machine’s outer casing to see where is leak initiated. Is anybody knew how to remove the casing from KRUPS EA844250?