Error when rendering unbound atoms

[TeoSakel]

This line is raising an error when trying to render unbound atoms:

polykit/polykit/renderers/backends.py

Line 168 in 0621278

geometry2.outline_material = geometry.material.outline_material

I am running this notebook: https://github.com/open2c/polychrom-hoomd/blob/main/examples/tutorial_binders.ipynb

I think the issue is the .material. outline material is a field of geometry set in line 146.