Thanks. I think I had forgotten that I had upgraded to node 5.0.0 and it appears there is a conflict. I downgraded to node 4.2.2 and reinstalled particle and it seems fine.
Hi,
I’m also facing this issue on node v5.5.0. I tried to uninstall and re-install particle-cli but it still doesn’t work. I get the same exact error message from the first post.