Error loading tutorial files

An exception was thrown inside the drawing pipeline:
Source: Xamarin.Mac
Type: Cannot access a disposed object.
Object name: ‘EtoPanelView’.

The display of objects will be disabled to prevent
this from happening again. Please save the file under a
different name and close Rhino.

any idea whats the cause of this?
thanks

Edit: I needed to have the rhino work space have a saved name for grasshopper to run correctly. Not the most intelligible error. But easy to fix

Can you say more about how you fixed the error?
I don’t quite understand “I needed to have the rhino work space have a saved name for grasshopper to run correctly.”
Perhaps I am missing something?

Thanks!

image

Save the prject file.