This sounds like an issue with Rhino installation. Can you try to just import Grasshopper in a GHPython component? Type line below in the component and press ok.
import Grasshopper.Kernel as gh
Does it give you an error?
This sounds like an issue with Rhino installation. Can you try to just import Grasshopper in a GHPython component? Type line below in the component and press ok.
import Grasshopper.Kernel as gh
Does it give you an error?