Check the reservoir level. Could be low. From experience, they do not work well unless full.
Does the leveling system work in manual level?
I found that on a Class C and on a Class A, the author level system would keep trying to level and kept getting high and higher. Wheels would come off the ground and the first step was a doozy!
After reading on another RV sight, went to manual leveling and found that it usually is very easy to do.
I use my phone with a level bubble on the floor and go from there.
First drop the jacks on the high side first till they are firm on the ground, then level the other side.