Calendar Sharing

When sharing my Calendar, the invitee gets the email invite, taps on join calendar and gets this message. Tried deleting calendar and creating as new one but still getting this message.

Tried using different devices and OS version all with the same result.

iOS 17.4.1, Sonoma 14.4.1, IPadOS 16.7.5

Calendar Unavailable

The owner stopped sharing, or don't have permission to open this calendar