Apple has confirmed on its System Status page that it is having issues with some of its services. Here's a list of the services that are down:
- iCloud Backups - slow or may be unavailable
- iCloud Bookmarks and Tabs - slow or may be unavailable
- Documents in the iCloud - slow or unavailable
- iCloud Drive slower than the normal performance
- iCloud Notes - slow or unavailable
- iCloud Mail - slow or unavailable
- iMessage - unable to send or download attachments
- Photos - unable to download photos or videos from iCloud Photo Library
- iWork for iCloud - slow or unavailable
Using the yellow triangle to indicate they are having issues with their services. Not everyone maybe experiencing this issue but you can contact Apple's support if your problem is not listed. We will update this page when the services are back again.