Upgrade from 6 to 7 - Generic Error Title?

Good morning.

I have a rhino 6 license in my zoo.
I just bought an upgrade to 7 and have both the 6 license number and also 7 license number.
When I go into rhino and click add license. I can add all the information but when I click continue I get this silly message … GENERIC ERROR TITLE.

I tried 3 times and it keeps coming up so I cant finish the upgrade,

Any idea how to fix this ?
Thank you.
Ian