It is possible that when the suspension is fully extended and then lowered to the ground that a sensor arm(s) will go over center the opposite direction than it should. When that happens the air suspension inactive light will appear.
For clarification- is one side of the vehicle at normal ride height? Or are both sides bottomed bottomed out? I assume you have checked the fuses.
Perhaps this link will be helpful.
https://www.suncoreindustries.com/pr...roubleshooting