This is complaining about the spacing between the points in the grid being too far apart. I think that the limit is about 200mm so a 3x3 grid can be at most 200*3=600mm etc.
The issue is that if the points are too far apart we risk either breaking the belts or chewing them up in the gears if the machine doesn’t have a good understanding of it’s calibration yet and tries to move too far outside the already calibrated area