Select Elements won't select multiple elements

Hi,

I was following the #9 tutorial of Karamba3D, I set everything the same way as the video but mine isn’t selecting both beams, It only select the first one for all parameters of the select elements component (Elements, materials, Cross Section,…).
For the beam and the truss elements the componet gets red with the warnign:
“The given key is not present in the dictionary”

Bellow I paste their ID:
Beam_A|Beam_1
Truss_B|Truss_2

Can anyone help?

Hi you can find the example here: K3D_Resources/09_ElementSelection.gh at main · karamba3d/K3D_Resources · GitHub