Seems like a tolerance issue. I added additional check for parallel cases. Now it works:
Replace NGonGh file in your library folder:
NGonGh.gha (523 KB)
Thanks a lot!
Can you show what is the message in rhino command line?
Seems you have two NGonGH.gha file in two separate locations loading at the same time.
I dont undestand. It is the same path.
Then, the question is the .gha unblocked?
Tomorrow I will update the package manager, so that you will be able to install it properly.