Hi Scott,
Thank you for reaching out to us!
I’m sorry to hear that you are having problems with your license key, let me help you to solve this!
You have a valid and active license key for Event Tickets Plus (ET+) as I can see from here. To get started, could you please confirm that you added your license key for ET+ in the correct field (screenshot here)? If you accidentally added it to a wrong product, that’s probably the cause of the issue. In this case you can just remove it from Events Aggregator and this message won’t show up again.
Does it help you to solve the problem? Please let me know if you have any other questions.
Cheers,
Patricia