Hi @will - I am following your tutorial but Yak.exe cannot find/load the grasshopper.dll so it fails.
Grasshopper starts normally from Rhino and the _PluginManager command shows that it is installed at :
C:\Program Files\Robert McNeel & Associates\Rhino 7\Plug-ins\Grasshopper\Grasshopper.dll
My workaround is to copy the Grasshopper.dll and any other GH_IO.dll etc into the same folder as Yak.exe. This allows Yak.exe to find and load them.
But I thought I’d report the bug in case it wasn’t already reported.
cheers
dan