Can't run example butterfly file

I have opened the indoor airflow example file and run it as is. I am receiving the attached error, which I have looked for by opening the files in Visual Studio Code and can’t find any characters out of place.

What am I missing?

Please let me know if you need any more information.

Rhino8 does not support Butterfly
You need Rhino7
That‘s why i still use Rhino7…

So simple. Thanks! I’ll give this a shot.