@billmeek Thank you fir the guide it worked perfectly for me.
Just for others, I was installing over an old NR/InfluxDB/Grafana install and had the following error on the NR install.
This can take 20-30 minutes on the slower Pi versions - please wait.
Stop Node-RED 
Remove old version of Node-RED
Remove old version of Node.js
Install Node.js 14 LTS ✘ Bad install: Node.js missing Npm missing - Exit
Clean npm cache
The solution from :
First try and bring your system up to date using
sudo apt update && sudo apt full-upgrade
