i did the following steps and manage to deploy successfully.
sudo apt-get purge nodejs
than
bash <(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resources/update-nodejs-and-nodered)
Stop Node-RED ✔
Remove old version of Node-RED ✔
Remove old version of Node.js ✔
Update Node.js LTS ✔ Node v10.15.3 Npm 6.4.1
Clean npm cache ✔
Install Node-RED core ✔ 0.20.3
Move global nodes to local -
Install extra Pi nodes ✔
Npm rebuild existing nodes -
Add shortcut commands ✔
Update systemd script ✔
Any errors will be logged to /var/log/nodered-install.log
All done.
You can now start Node-RED with the command node-red-start
or using the icon under Menu / Programming / Node-RED
Then point your browser to localhost:1880 or http://{your_pi_ip-address}:1880
Started Sun Mar 31 20:54:37 +08 2019 - Finished Sun Mar 31 20:55:22 +08 2019
thank you for your continues support. do really appreciate.