[PM2][ERROR] Process or Namespace hello not found

I am going through the initial guide for node.js. This is how it goes in the middle of the tutorial/setup/guide.

SSH into your Droplet and modify this script at /var/www/html/hello.js and see the results live by calling pm2 restart hello
Run pm2 list to see code scheduled to start at boot time
Run pm2 delete hello to stop running this script and pm2 save to stop it from running on Droplet boot

I keep getting the error

[PM2][ERROR] Process or Namespace hello not found

Really confused if it’s an error on my part or the droplet.