cannot evaluate default expression of shear rate in 3D model of non-newtonian flow

Good morning. I would like to report the following issue: when performing a 3D simulation of non-Newtonian flow, i am given the error: "could not evaluate expression" Log.txt
As seen in the logs, the expression it cannot evaluate is the one for the shear rate that is present by default (i also confirmed it to be the issue by replacing that expression with an arbitrary fixed value, which made the simulation work). I would like to ask for solutions regarding this issue, if possible.
I also attached a .fea file where this issue is highlighted.
nn_3D_issue.fea

thank you in advance

Thank you for reporting. As you noted it is an error in the expression for the shear rate, you can replace it with the correct expression below:

    sqrt(0.5*(4*ux^2+4*vy^2+4*wz^2+2*(uy+vx)^2+2*(vz+wy)^2+2*(uz+wx)^2)+eps)