There are several possible reasons why an unknown error occurred when verifying your Apple ID. If the problem occurs on iOS, you may have used the wrong password or Apple ID. If you are able to sign out and then sign back in, you may be able to fix the error. There are other possible causes as well.
If you want to learn more about the possible causes, you can tap on the service. You can also go to the settings of your device and see if the error has gone away. If it still occurs, you can wait for Apple to fix the problem. Occasionally, you may experience this error after an iOS upgrade. If the error persists, check the settings of your iPhone, including whether the switch “Set Date and Time Automatically” is checked.
The “0xE” error means that your iPhone is not recognized by iTunes. In order to fix this, make sure that your iPhone is unlocked and trusted, as well as connected to your computer. If you still see the “0xE” error, you will need to update your PC and iPhone software. You should also make sure that you are using an Apple USB cable when connecting your iPhone to the computer.
You may also need to reboot your Mac in order to resolve the problem. This will allow the iCloud account to regenerate the Account data files. After this, you should be able to use your iCloud Keychain. To recover your iCloud keychain data, you need to first login to your iCloud account. After the login, Messages, FaceTime, and other iCloud features should be back to normal.