Netgear wifi extender AC1200 can't login

Hi there, I'm sure many of you are on here because of netgears **bleep**ty customer service. I recently purchased a new modem/router that does not have a wps button on it. I followed the instructions of connecting my wifi extender nearby to the working router/modem. I got my laptop and connected to the extender while all lights were Green. I open my Internet browser and went to www.mywifiext.net. a page pops up that says new network extender setup. I click it and put in an email and password and security questions. When I hit next it just takes me back to the front page over and over again. There is nothing I can do and it's extremely frustrating. Any tips?