Hey Elizabeth,
This just means that your license has expired for the add-on. To fix this you just need to ask your administrators to go to the "add-ons" section of the confluence administration. Once they are there, there will be a section for "Team Calendars Plugin. They probably tried the free trial which has now expired. They should have an option to purchase a license. If they do this your error should be resolved!
Thanks,
Kian
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.