Failed to open link download page

I am trying to provide some support to my mother in Australia from the UK - so I am connected to the zoho.eu server, but when I send her the link to use, she gets an error message saying the server cannot be accessed (or something similar) at the present time. When I use the exact same link at the exact same time, I get a successful response.

I am assuming this is a regions issue? If so, how do I get to be able to set up unattended access on her PC?

TIA.

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Release Notes: Version 1.91, February 2015
Unattended Access (Beta) is live! Unattended Access, a feature requested by a lot of our customers is live now. Currently, it's in beta. You can add up to 100 computers per Technician subscription. They can also be accessed by your organization members. My Computers list in Zoho Assist home page will always display the online status of your unattended computers. You can rename the computers whenever you wish. Currently, Unattended Access can be configured only for Windows computers. Nevertheless,