Such errors usually mean that the .npm folder in your HOME is not owned by you, so you have no permissions to write to it. Check if your user (the one you run WebStorm with) has the right privileges in ~/.npm, and give it the needed permissions ( 'sudo chown -R $USER ~/.npm' )
Such errors usually mean that the .npm folder in your HOME is not owned by you, so you have no permissions to write to it. Check if your user (the one you run WebStorm with) has the right privileges in ~/.npm, and give it the needed permissions ( 'sudo chown -R $USER ~/.npm' )