I see that the materials and constructions are not loaded.
The IDF files are not empty. I also replaced the files from a machine where this component works.
I am not sure whether re-installing EnergyPlus and/or OpenStudio will help.
Any thoughts anyone?
I deleted the two files OpenStudioMasterTemplate.idf and userCustomEPLibrary.idf
After that, I restarted Rhino & GH. This placed new files in the same location and then the materials and constructions are correctly loaded.