Complete these steps as an organization owner who manages Google Workspace for your company.
You will not receive an email when a user requests access to Harbor. Sign in to the Google Admin console as an organization owner: https://admin.google.com
Open the "app pending review" notification (the count is not real-time — click it even if it shows 0).

Review the list of access requests for Harbor.

Grant access to Harbor for your organization. Users can then connect Google Calendar and email without seeing the Access blocked error.

For integration support, please contact us via Harbor Support.