Can anyone explain what's the issue?

Question

The error I am getting:

/usr/local/lib/node_modules/npm/bin/npm-cli.js:85
  let notifier = require('update-notifier')({pkg})
  ^^^



 SyntaxError: Block-scoped declarations (let, const, function, class) 
  not yet supported outside strict mode

Answer 1

Try updating your Node version. This will globally update Node and npm and install the stable version:

n Helps with version handling.

About n : https://www.npmjs.com/package/n

sudo npm install -g npm
sudo npm install -g n
sudo n stable

If that doesn't work try:

sudo ln -sf /usr/local/n/versions/node/11.10.1/bin/node /usr/bin/node

This will install the latest node version and create a symbolic link.