Welcome to irv2.
Here is a Brochure
and 0wners Guide
for you and below in my signature you will find links to many more for your coach.
Is it in the panel that has the wipers mounted on it and is the crack through one of the wiper mounting holes?
When the jacks were deployed did the coach twist as jacks were going down and adjust for level?
Have never seen a crack on panel in that location there have been some in the rear of coach's near the rear panel opening.
I would call Newmar and see if they can help or find a Boat Shop fiberglass repair and see if it can be repaired and reinforced in the back of panel before repaint.