Couple of things to have in mind. Apply your scale, make sure your scale 1, 1, 1
Check if you have double vertices. Select everything and M -> merge by distance.
Model to scale. Maybe you model is very big or very tiny, making the values in the modifier all wonky.
Check for flipped normals. In your overlays, check you face orientation to see if it’s all blue. If not then select everything in edit mode and shift N to recalculate normals.
Try those things, if nothing works come back and we’ll figure something out.
