MG8121

Cause

Pre-shared key mismatch between AP and client

Fix Steps

1. Forget the WiFi network on your device
2. Access router admin panel at 192.168.1.1 or 192.168.0.1
3. Navigate to Wireless Security settings
4. Verify password contains no special characters that may conflict
5. Temporarily switch from WPA3 to WPA2/WPA3 mixed mode

Related Errors

• T8558 – Actiontec T8558 Authentication Error
• MR3071 – Synology MR3071 Authentication Error
• RT-AX88U-E547 – Asus RT-AX88U-E547 Authentication Error
• C-3720 – Cisco C-3720 Authentication Error