iCloud is not working with my Mac
There are none detailed in my preferences . Haven’t used my Mac book air for a few months and iCloud is no longer working
[Re-Titled by Moderator]
MacBook Air 13″, macOS 10.14
If you're referring to the server settings for an iCloud email account: Mail server settings for iCloud email clients - Apple Support
Also: If iCloud Mail isn't working - Apple Support
For checking errors: Use Connection Doctor in Mail on Mac - Apple Support