I recently reset factory of my router and then unable to log in to web ui i use the username and password "admin" and it shows "Login Failure". my router globe is in red light. I tried disable firewal

Hi, I just bought a Archer AX6000 router. I'm having trouble with the 5 Ghz band. After a clean start up of the router the 5Ghz works fine. I have laptop, 2 phones and a tablet that can all connect to