macOS High Sierra 10.13 not updating to macOS Monterey (The recovery servers could not be reached)

I have just reinstalled the macOS High Sierra 10.13 in my MacBook Pro 2015 Mid. Now I want to upgrade from High Sierra to Monterey!

The problem is that the OS System Preferences not showing any Software Update options, but I am able to download any update from the app store. Lets suppose I downloaded the Monterey and when I start the download/install it always give me the following error:

The recovery servers could not be reached.

What I have tried so far is used a high speed internet connection using WiFi as well as Ethernet cable but the error still persists. Also I tried restarting/shutting down the Mac several times but no success!

I just want to upgrade my Mac book to Monterey from High Sierra!

Can somebody please figure this out what is wrong with this?

Thanks in advance.

Regards