I do receive an error with the latest versions or Rhino8WIP when launching Grasshopper. Basically when it is the time to load GHPython module, the loading screen freezes for a few seconds and after that it is giving errors when loading any component writen in Python. I have a few different ones installed, the biggest one being the Fennec components. The same components are loading without any issues in Rhino7.
You may want to see if any of the related topics in Rhino WIP Feature: Get ready for .NET 6! give you more info (for instance the topic related to loading of GH1 in Rhino8 WIP linked at the bottom of the first post).
I do used the command SetDotNetRuntime, and first I do selected NETCore, which gave me the same errors. After that I switched to NETFramework and that solved the issue. Looks like NETCore it is missing something?
