Hi Will,
Lets look at your info. Please go to your Rhino.Inside.Revit about and see details.
This could be related to a Revit Addin. A quick way to troubleshoot is to isolate Rhino & Revit from other revit addons we can start a new instance of Revit like so…
Hold Shift+Cntl and the Rhino Start Button on the Revit Ribbon (Green Dot)
