SEN-ET: Problem with Estimate leaf reflectance and transmittance

Hello, I am estimating the leaf reflectance and transmittance however I am receiving an error message I can’t seem to resolve.

It says " ModuleNotFoundError: No module named ‘jpyutil’ "

Does anyone have any suggestions on how to fix this?

Could you provide more details about the OS and SNAP version?

The operating system is Microsoft Windows 10 Education and the SNAP version is 10.0 with Python 3.6. Is there anything else that you need? Thanks