Good afternoon Alicia and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
Based on your screenshot, I believe that what is going on is that you are trying to use the Events Calendar Pro license in the Event Aggregator license field.
The Events Calendar Pro’s license field only appears when you have downloaded and activated the Events Calendar Pro add-on from your downloads page: https://theeventscalendar.com/knowledgebase/new-user-primer-the-events-calendar-and-events-calendar-pro/
Let me know if that helps.
Have a great day!
Geoff B.