I have a client that tried to activate my product on Windows 7 with Excel 2013 32-bit and they get this error when they enter the activation code and press “Activate.” They don’t appear to have any firewalls or issues on their end; they’ve tried it on two different internet networks. My site is using HTTPS.
For reference, I am able to successfully activate products on other PC’s with various versions. Any ideas of what I could try to resolve this? I’m truly at a loss.