If you are experiencing issues syncing your CASEpeer calendar to your external calendar such as Gmail or Outlook, verify the calendar administrator has granted the Cronofy calendar sync engine to access your calendar service application. If this has not been completed, review the following links for a detailed guide on how to complete this authorization:
Google Calendar: https://docs.cronofy.com/calendar-admins/enterprise-connect-gsuite/
Once this is completed, unlink your external calendar from CASEpeer and reconnect.