Still having this issue in 2021. "The server responded with "400" to operation CalDAVAccountRefreshQueueableOperation." Hard to run a business with my technicians when appointments are missing because of this issue. Can we get a solution to this already apple?
iMac 27″, macOS 11.5
Turns out it was an iCloud system failure, resolved overnight. All should be working now.
Turns out it was an iCloud system failure, resolved overnight. All should be working now.
This just started happening to me last night, too and it's mission critical that my iPhone, laptop and desktop synch calendars!! Help!
Same with me. This morning was a mess everyone’s day was blank. Spent most of the morning trying to figure out what the **** to do. I tried everything the Apple site says nothing helped
Me, too. Just can't access icloud server to sync calendars. have looked all afternoon for a solution but failed.
Yep. The little grey triangles with exclamation marks stay on my mac calendar and when I try to do ANYTHING to the calendar on Mac I get errors.
Yes, it seems to be working great for me this morning. the alert triangles went away.
YAY
request for account "iCloud" failed
