Based on information obtained from the Apple community and MacRumors forums: iOS 16.3 appears to have an impact on the iCloud backup feature for some people that did the upgrade. iPhone users that are experiencing the problem tried to manually activate the
iCloud back up, but the iOS 16.3 bug appears to be preventing the function of the settings properly. The impacted users see the automatic iCloud Backup being disabled when they attempt to turn on the auto backup feature. Most of the complaints received are from iPhone users, although the problem also seems to affect the iPad as well, as long as the device is running on version 16.3. Multiple reports indicated that some devices backed up even with the error message but not particularly the case for other users, which leaves the iCloud as the possible source for these issues.
