The system told me the version of the team-calendar plugin don't work with our licence ffrom our confuence (6.10) ??
You replaced the Key as well, right?
In this case super odd. :/
Since Team Calendars is a supported add-on, it might me a good idea to contact Atlassian Support: https://support.atlassian.com/contact
Choose technical issues and then marketplace apps.
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