Zoho Assist failed to use unattended link

Zoho Assist failed to use unattended link

I'm new and trying to use/test an unattended mode to be able to use remotely my Samsung android phone from my iPhone.
I can send an activation link/email to my email, but every time the unattended activation fails with message below:

This site can’t be reached

Check if there is a typo in null. 

DNS_PROBE_FINISHED_NXDOMAIN

Please help,
On both phones I'm using the same account/email
-Mike


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                                                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,


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