Hey nickrout, I tried changing my DNS to 8.8.8.8 and also later to 1.1.1.1 and it did not fixed the issue.
would you have any other insights on this to help me out?
Have you checked the DNS server issues documentation?
What are the commands
ha dns info
and
ha network info
telling?
Yes,Without changing anything I installed version 11.0 after downloading with the similar method which I was using for other versions. And it worked.
One more thing.
One more thing is that. this is the 2nd time that I installed 11.0 in 2 days. as when I tried to update it . It again hanged. So I have to restart the entire process and now loaded 11.0. and not updating it
HI Tamsy, Thank you for the reply. Attached is a picture of the commands.
Any insights?
I appreciate the help
Hi Vijay_Naru.
Where did you find the installation file for H.A 11.0.
Im using raspberry imager to dowload H.A to the sd card, and there I can only find version 12.4.
Thank you for your help
nameservers:
-192.168.1.1
ready: true
All good on HA’s side.
Now look closer at your router (192.168.1.1). Make sure nothing outbound is blocked.
Try “https://ghcr.io/v2/” through a webbrowser. Does it show:
Hi Tamsy, Thanks for te reply again.
I tried searching on the web browsr of my laptop (connected to the wifi) the link above.
the following apeared:
{“errors”:[{“code”:“UNAUTHORIZED”,“message”:“authentication required”}]}
Thank you for your help,
I still dont have a solution for installing home assistant
So we know DNS is working without issues.
Have you retried the installation? Maybe it was just a temporary eror.
I get
{
"errors": [
{
"code": "UNAUTHORIZED",
"message": "authentication required"
}
]
}
I tried several times to re install. I am always getting the H.A version 12.4 from the raspberry imager.
I don`t understand why it does not work.
Weird indeed. Considering that accessing “https://ghcr.io/v2/ ” through a webbrowser from a PC/Laptop connected to the very same LAN (192.168.1.x) as your RPI is in seems to work.
Did you configure your router to use DNS servers of your choice like nickrout has suggested above?
You can also configure HA to bypass your router’s DNS and directly use another DNS server. For this to work make sure your Router allows outbound traffic LAN → WAN on port 53 with protocol UDP.
From the CLI:
ha dns options --servers dns://8.8.8.8
ha dns restart
Also make sure your ISP is not doing ‘Transparent proxying’ in the background by rerouting all DNS traffic to their DNS servers without the users knowledge. Unfortunately this is a common technique in many countries.
Do a DNS Leak Test and make sure the output only shows the DNS servers you have configured on the router’s side.
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Also check what your MTU is on your router (should likely be on WAN settings on most routers and should default to 1500 - need to know itlf it’s set to anything else… Anything smaller on any router between you and the download can cause issues - the HAOS container uses 1500. Insert technical reason why MTU even matters later. )
Ive seen a number of these weird can’t install issues because an MTU is set too small somewhere between the client and the source server so while it resolves it won’t download - but same error message (that error needs to be updated to denote bad name resolution v. bad download IMHO)
Reference posts: (no don’t edit your MTU down unless you confirm it’s a problem…)
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@Vijay_Naru and @automatt
First, try disabling IPv6 in your HA installation and restart HA. If this doesn’t help, try disabling IPv6 in your router.
It’s not uncommon, that the DNS for ghcr.io is only resolved to IPv6, and that can (not must) cause problems. I’d say, it’s a 50/50 chance, so worth a try. 
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SOLUTION!!!
The solution I found for the problem was to edit the DNS on the raspberry side of things.
In the beginning I changed the DNS on my Router and it did not work, I set it to the Google DNS 8.8.8.8.
So I tried used commands such as “network update end0 --ipv4-nameserver 8.8.8.8” and did not have success.
I also tried " dns options–servers dns://8.8.8.8" as @Tamsy suggested and it did not work for me.
So I used the command “login” to enter a different command window , where I used “nmcli con” will display the connection and the name of your host, mine was “Supervisor end0”. So I used “nmcli con edit “Supervisor end0”” to enter the nmcli environment. If you use the command “Print” you will see all the network parameters. My DNS was blank and set to automatic. So I used “remove ipv4.dns” in order to remove all entries from the ipv4.dns value. Then use the command “set ipv4.dns 8.8.8.8” which is the same as I set in my Router before . Enter "print"again and confirm the ipv4.dns value is correct. Finally enter “save” and “quit” to apply the changes and leave the nmcli container.
Then I “exit” to be returned to a login prompt, and use “root” again to enter the “ha >” CLI . So, I used “Host restart”, waited for a couple minutes and reload my webpage windown http://192.168.1.21:8123/.
After 10 minutes Home assistant was working properly.
Thank you for all that tried to help .
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Yep, you were right with DNS - again… 
Trouble is the solution isn’t always the same, some people simply set up another DNS server on their router, other times (like this one) its more complex.
Maybe we need a cookbook entry.
I’m with you. In my case it was DNS as well, but only the IPv6 DNS (hence my suggestion).
If you want to, please do a cookbook entry, I wouldn’t know how to handle all the totally different cases…
On Github your will find all versions which can be retrieved with a little trick.
replace the last 11.0 with any release version you want to download.
Here the important question is when Version 11.0 has got installed without any problem and in the similar settings of router etc, then what is the need of changing settings.