Apple’s iCloud services are in the midst of an extended outage, as first noted by The Verge, which reported the issues have persisted for hours. The screenshot below shows that almost half of Apple’s iCloud services are in the grip of an unspecified issue.
We’ll update this story when there’s a change.
I just checked and it seems to be okay, many items are annotated with “Resolved Issue”.
https://www.apple.com/support/systemstatus/
Aha! I’ve been trying to set up a clean MacOS installation and having trouble with iCloud all day. When I checked System Status earlier it showed all green. Maybe it’s not me?