The error you are reporting is for the Liooert 3.0 electric jacks...
If you have six point hydraulic system you need to run the jacks up and down several cycles to purge air out of the system...it’s self bleeding
There are NO sensors on hydraulic jacks... if the motion doesn’t change the front or rear remote sensor angle when a set of leveling legs is moving the typical error would be
Out of Stroke... which means jack didn’t move enough to change angle of the RV
Hydraulic jacks ... if six point system run in tandem... fronts are lead and follower
Left and right side jacks ... mid and rear on each side are lead and follower and are separate on each side