Fix iCloud error An error occurred during authentication while connecting iCloud with Windows 11/10, in order to sync data.

Authentication errors also happen in laptops, tablets or any other IP-capable devices not just smartphones. So they suggest doing troubleshooting procedures on both the wireless network and the phone.

A quick fix to Wi-Fi authentication problems on Android is to toggle airplane mode on and off, or "forget" the Wi-Fi network and reconnect to it.

The phone connects to Wi-Fi, but drops shortly after and yields a message saying “authentication error occurred.” ...