Cannot install Node-Red

Hi! I am new to this so I do not know much about writing code or anything. I have looked at some youtube tutorials how to get starting installing Node-red as an Hassio add-on. I have copied the url and added NotoriousBDG Hass.io Add-Ons (Deprecated) on Add on store and clicked on Node-Red (derecated) at the bottom of the Page. When I click on the blue INSTALL buttom it loads for a while and then it blinks red and I am back to square one again. It will not install. What do I do wrong and how to troubleshoot this?
Anywone?

I have hassio installed on my Rasberry Pie and am using Zigbee devices.

You should be using this https://github.com/hassio-addons/addon-node-red version and not NotoriousBG.

Do you know what that word means?

Okay thank you! Do I copy the URL-link as I did before with the other URL-link? Or how do I add it to Home Assistant?

Nope! I did not recognise that word before. Thank you for informing me!

Now I have installed Node-RED 1.4.0
Flow-based programming for the Internet of Things.
Visit Node-RED page for details.

But I have still a problem! When I click on OPEN WEB UI it does not work! It says:

This site can’t be reached

192.168.10.150 refused to connect.

Try:

ERR_CONNECTION_REFUSED

What do I do wrong?

Thank you for your help! It worked but I still have a problem now!

Nope! I did not recognise that word before. Thank you for informing me!

Now I have installed Node-RED 1.4.0
Flow-based programming for the Internet of Things.
Visit Node-RED page for details.

But I have still a problem! When I click on OPEN WEB UI it does not work! It says:

This site can’t be reached

192.168.10.150 refused to connect.

Try:

ERR_CONNECTION_REFUSED

What do I do wrong?

It’s in the normal add-ons. You don’t have to add any urls or repos.