I had the same error. npm uninstall npm -g, rm -rf node_modules didn’t help me, because when I tried I was getting Error: Cannot find module ‘semver’. But I solve my problem with these steps (this will delete other global modules you may be using):
sudo rm -rf /usr/local/lib/node_modules
sudo rm -rf ~/.npm
brew uninstall –force node
brew install node
Hope this will help those who are getting a similar problem.
I’m facing the same issue here.
If this occurs right after you run brew install yarn try running yarn global add npm and voilà – fixed!