Opal (GL-SFT1200) - admin panel access don't works

Routers
1

Hello, I try to open the Admin Panel during first setup, but I can't access visiting http://192.168.8.1. I check router's IP address from Windows 11 Control Panel and my IPv4 Default Gateway is 192.168.1.1, but using this address on browser in redirect me on login page of the modem.

I connect the ethernet cable on one of LAN port and internet works correctly, but I can't set up Wi-Fi SSID and password.

Can you help me please?

2

Is your router connected to the modem via the WAN port?
This is important.

Modem -- WAN --> Router
PC -- LAN --> Router