After running yo angular and then cd'ing into the application's root folder (at same level as the app folder, gruntfile, package.json etc) I try grunt serve and I get the above error. Grunt won't start a server for me.
I have searched all over but couldn't find say to run npm install and bower install within the application's root directory, which I have tried but still the same error.
I've updated and checked bower/grunt/npm and they're all good.
Any suggestions please?
I think I have found a solution!
http://yang-wei.github.io/blog/2014/06/01/npm-install-issues-plus-angularjs-set-up/
Running sudo on all the installs causes issues on the NPM folder in the home directory. I needed to change permissions of all usr/local folders by running:
sudo chown -R $USER /usr/local
sudo chown -R `whoami` ~/.npm
npm install -g yo grunt-cli bower
Now I go through the process again and no more errors!
The above link also seems to be pulled together from a bunch of answers at npm throws error without sudo