Based on this post it appears you have a working WWAN side. 404 Page not found - GL.iNet

I assume you are connected on the LAN side via Ethernet. The basic issue 'appears" to be you have not (not able??) to configure the WLAN side.

Please use a tool like WinSCP to find and post you /etc/config/wireless and network files.

In LuCi if you go to Network=> Diagnostics=> ping do you get a reply?

I expect radio1 can reach the internet, and radio 0 is not working (WLAN)