Error code 128 Cant install plug in
npm ERR! code 128
npm ERR! Command failed: /usr/bin/git clone --depth=1 -q -b master git://github.com/nicoduj/harmony-websocket.git /root/.npm/_cacache/tmp/git-clone-5236a626
npm ERR! fatal: could not create leading directories of '/root/.npm/_cacache/tmp/git-clone-5236a626': Permission denied
npm ERR! 

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2019-02-12T18_56_29_734Z-debug.log