Hi Mary!
That is no fun at all!
Let’s see if we can help you get this working so you can begin using Event Aggregator. 🙂  The good news is that I just tested your license key and was able to validate without issue. Now it’s just a matter of digging in and trying to see what you might be running into.
The first thing I would try is this:
- Remove your license key and click save
- Add your license key back in, let it try and validate and then click save again.
Our validation server may have had a little hiccup at the time you added the license key in.
If you have no luck there, my next thought would be to see if you have any security plugins installed that are preventing outbound communication from your website elsewhere, such as to our validation server.
If you do not have any such plugins installed, please reach out to your hosting provider to see if they have any security that would be doing the same thing. Its very possible that your hosting provider can help ensure the communication is not tampered with on their end.
Please let me know if any of the above helps you resolve this issue. We’re here to help!
Have a great day!