An error occurred while setting the material for each side

hello. I am conducting research on changing the building standards and materials of a rectangular modular building. An error occurred in the process.

In order to optimize the size and materials of the building, the rectangle was designed parametrically.
After that, the rectangle was divided into 6 sides to apply a different material to each side of the rectangle.
After that, an error occurred while adding a material to each face. “Type conversion failed from Goo to GeometryBase”
I would appreciate it if you could tell me how to solve it.
thank you. (38.0 KB)

You put the wrong inputs for the HB Face components. You can check the exemples folder wich comes together with the LBT plugin for the way a workflow should be set up. (43.7 KB)

Thank you very much for your advice.
As you said, I’ll study it a bit more with an example file.