Hello! I tried the method at https://github.com/PeriHub/PeriLab.jl/issues/143#issuecomment-2041515228 , for a 2d plate model with varying material properties. However, I am getting the following error message:

Hello! I tried the method at https://github.com/PeriHub/PeriLab.jl/issues/143#issuecomment-2041515228 , for a 2d plate model with varying material properties. However, I am getting the following error message: #44