ISSUE material mapping in Revit

[andreea101]

Hei guys, my question is more related to this specific node from BHoM, and why it does not report anything.
Reading the 3 floors i have in my revit model works fine, just this node - the material data set for the floors -BuroHappold_EC3_Concrete_LW_3001-4000 - does not report anything back, it s like the data is not connected to the actual geometry in the Revit model, not sure why? am i missing something? see below snaps that the floor elements is being read at the beginning