Error message when trying to install Trados 2021: Xml Exception, Root element is missing.

Hi,
I'm getting the above error message (Xml Exception, Root element is missing) when trying to install Trados 2021, and the program is aborting. I had a similar issue when I first tried to install Trados 2019, and a member of the tech support team explained what to do. I can't remember what I had to do to resolve the issue, though, and it looks as though I no longer have a support and maintenance agreement in place. 
Any help gratefully received.
Huw D.

Parents Reply Children