Home assistant refused the connection

I am new with home assistant, just installed on a Pi5 homeassistant. First time I can acces the web page and can connect some home equipment. A second time the Pi5 refuse the connection. I can ping to the Pi5.
I see many more users having this problem , but dont see any sollution.

What did you type in to access?
The IP address URL is the most reliable, BTW.

I found out how to go on.
When I remove the port 8123 on the URL I can acces the home assistant web page . Now I use http://homeassistant.local/home/overview , thats working.
Great

If you just installed, the port is 80 not 8123. It changed a short time ago. If you type http://your PI IP in a web browser that defaults to port 80, which is why it works when you don’t specify the port.

There was an magic update to the code and the corresponding documentation which may have been missed by the sollution providers if the release notes were not referenced…