I\'m attempting to execute npm install in Git Bash client on Windows 8.1 but receiving the following error:
npm WARN optional SKIPPING OPTIONAL
What worked for me was to start windows command prompt as Administrator and vagrant up from there.
The problem was, that windows as a Host machine, needs administrator privileges to create symlinks.
to get a rid of previous unsuccessful installation I run npm clean-install
npm run dev still ends up with some errors but ui:auth works.