How do I fix 'Safari can't open the page due to network connection loss' when downloading a document?

Re: "i cant download a document as it says safari cant open the page as the network connection was lost i've rebooted but still nothing any advise please Unfortunately I don’t have any other details"

Seems some documents online may only be able to be read online, as they are not available to be downloaded.

The author of a document has the copyright. They can control just what can be done with the document.

Else, try this, if the document is a .PDF file that you are permitted to download:

Download a PDF from Safari to your iPad - Apple Support

Eg: says

You can save a PDF from Safari to read later or share with others.

1. Go to the Safari app on your iPad.
2. Go to the PDF, then tap .
3. Tap Save to Files, then tap Save.