Hi. This happened to me 2 days ago.
yesterday I fixed it. I will explain how I did it.
first of all. The problem is the seat rail got stuck with one of the lever mechanisms. So this is what I did.
1 remove the second row seat. To do this you must remove 3 screws and a nut ( not hard)
2 take the seat out and place it on the ground facing up
3 in the upper part of the lower rail is the stuked mechanism. Loose it with the help od a screw driver or your hand. You can also give a fer knocks with a hammer to the rail.
4. Done. Now put all back together.
I forgot to take pictures, but it wasn’t hard