Difficulty reconnecting AX1800 EAX15 to replacement Frontier router

I had to replace a dying wifi router for my Frontier 1gigabit internet service.  I have a Netgear AX1800 EAX15 wifi mesh extender that was setup on my old SSID.  When I replaced my dying wifi router with the replacement "factor refurb" from Frontier, I chose to change my SSID from the factory assigned one on the router to something different than what I had on my initial router that I was replacing.  I'm now not sure if my Netgear AX1800 EAX15 is going to recognize the new network name that I created.  I pressed the button on the side that refreshes the WEP and all the lights on the extender are green, so I'm assuming it recognized the new SSID. But now I can't access the Netgear login page to manage the extender info. 

Can someone please help? I feel like I'm probably missing a step or having a brain fart with not doing something. 

Thanks in advance,

Steve