it looks like you made cahnges to the body folder, because the model will not load properly.
When you look at the model tree:
Main.HumanModel.Scaling.GeometricalScaling
there is no left nor right.
so, it cannot find the “left” in your script:
Scaling.GeometricalScaling.Left.Thigh = { #include “MyScalingLaw.any”
AnyFunTransform3D &ScaleFunction = MyScalingLaw.Transform;
};