Others, on the other hand, are seeing "The network connection was lost" error messages when they try to download macOS Monterey.
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That's not all, either. A few get the following error message: "Installation of macOS could not continue. Installation requires downloading important content. That content can’t be downloaded at this time. Try again later".
There are a few reasons why you may encounter this issue. It may be because a lot of people are trying to download macOS Monterey at the same time. If you think this is the case, try again later on a non-peak time to see if the download works then. You can also check the live status of the Apple Server to make sure everything is alright on Apple's end.
There should be a section labelled "macOS Software Update". If it has a green dot, then there's no issue, but other colors suggest there's a problem with Apple delivering the update.