Lito Yap
Ansys Employee

Consult IT if they checked the dependencies before installing Ansys Optics/Lumerical on the cluster? See the KB below or details.
    > Installing on a shared filesystem on Linux – Ansys Optics   

Did you try running the script I provided from the CAD/GUI >> Script file editor window as shown in the image on my previous post? ☝

import lumapi
fdtd = lumapi.FDTD()