I am creating a project in the pollination for Revit app but when I try to assign material properties, I get the error: Object reference not set to an instance of an object.
Here is a screenshot:
This is most likely related to the other topic that you posted here.
Should be an easy fix on our end. As I mentioned, most of our users are purely interested in the geometry side of things. We should do a better job maintaining the properties step. Thank you for documenting the bug, and sharing your model.