It used to be that routers had a simple, one mouse click method to disable DHCP service. If it exists in Archer AX 21, I haven't found it. Can it be done, and if so, how?

After installation, I went to do some admin work and logged in via the IP address 192.168.0.1 After a few seconds a page is displayed saying I'm no connected to the router's network. I'm connected via