On your Mac, go to System Settings > Apple ID > iCloud, and under the Apps Using iCloud option, choose iCloud Drive. Disable ...

If you've felt the pain of losing all the photos, videos, and documents saved on your iPhone, or want to avoid it, iCloud is ...

iCloud is Apple's cloud-based storage solution to manage and sync your personal, app, phone, and other data across the ...

it can also occur if your iCloud Drive is running out of free storage space. The first thing to fix the issue is to close iCloud completely, relaunch the app, and set up iCloud Drive again.