The request for account “iCloud” failed. The server responded with “400” to operation CalDAVUpdateShareesQueuableOperation.
Why do I keep getting the error above on my iCal program
iMac 27″, macOS 10.13
User profile for user:
Chris_V89
User level:
Community Specialist
Hey there Iceman57,
Thanks for reaching out to the Apple Support Communities. To get started, can you let us know what you're attempting to do when this error appears? For example, are you trying to share an iCloud calendar?
If so, take a look at the steps listed in the following resource that can help with troubleshooting and isolating the issue further: If your iCloud Contacts, Calendars, or Reminders won’t sync - Apple Support
If not trying to share an iCloud calendar, provide us with more details on the steps you take when the issue appears and we'll continue from there.
Take care!