iCloud error: Cannot connect to the server
If you see the Cannot Connect to Server error message, you should certainly check the status page. If everything seems to be working, then you should log out and then back in again on your device. On an iPhone tap Settings>Your Name>Sign out; on a Mac, choose System Preferences>iCloud and Sign Out. You should then sign in again.
Apps won’t save to iCloud
If an app fails to save into iCloud, then you should certainly check that it is enabled to do so in iCloud Settings/System Preferences. On a Mac or iPhone, you will find a list of apps that are enabled for your iCloud account listed there. Check to make sure the app is enabled — it should be checked in the list on a Mac or toggled to green on an iPhone.
Can’t log in or update iCloud
I’ve rarely experienced this, but it has happened when using iPhones: You are trying to sign into iCloud or you are updating its Settings, and it gets stuck on the login screen.
The best solution is to turn your device off by pressing and holding the power button and either the volume up or down button (or just the power button on older iPhones). Once the device switches off, switch it on again and try to get back into iCloud.
Hope You Find This Useful,
Peter