Having trouble changing my LAN IP and Subnet mask. I could not find a web UI so using my smartphone app, I try to set IP to 192.168.4.1 and subnet mask to custom: 255.255.252.0. I keep getting the mes

My model is not listed above so I just chose the AP300 because I had to select something in order to preceed. A few years ago I bought a TP-Link TL-WDR3500 router & had difficulties & stopped using it

Thought I'd try a TL-WDR3500 that I bought a few years ago but never used. I went through the web-based setup but could not conect to the Internet. I reset the router to default & tried again but stil