I have a calendar set up successfully in macOS Calendar app, and I’d like to delegate write access to it for a colleague. In the Calendar app I go to “Delegation” and click the “Edit” button to change who can edit the calendar - but it throws an error “The calendar was not found on the server.”. Clearly that’s not true since it’s working fine. If I ignore that and continue to add a user it shows the user list, but then shows teh same calendar not found error again. Any idea what might be going wrong here?