If you get this error when someone try to book a meeting with you, this article might help.

There are two ways to solve this problem.

The quick solution (but doesn't work every time)

Follow this link https://koalendar.com/logout/force
Then log back in

The second solution

Ask your G Suite administrator to check if your Calendar accesses are enabled for your account here https://admin.google.com/ac/appslist/core

Once this is done you need to reset Koalendar access to your Google Calendar. To do so, go on this page https://myaccount.google.com/permissions?pli=1, find Koalendar in the "Third-party apps" list, and click on "Remove access"

Then log out and lock back in on https://koalendar.com
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