Rhinonest 0.1 for Grasshopper issues

Hi i've just downloaded RhinoNest 0.1 for grasshopper, and most of the functions are working as intended. However the "RhinoNest - Object Freedom" and the "RhinoNest - Nesting Criterion" functions doesn't work.

I get the following error message: (see the attachments)

I've tried to reinstall it and delete the RhinoNest map, but to no avail.

Does anyone have any idea on how to fix this? Any suggestions will be appreciated :)

Ps. im running Grasshopper 0.8.0007